diff --git a/e2e/coverage-map.mjs b/e2e/coverage-map.mjs
index fd28e92a..f35c115b 100644
--- a/e2e/coverage-map.mjs
+++ b/e2e/coverage-map.mjs
@@ -179,6 +179,9 @@ export const commandCoverage = {
       "analyze_pasted_cookies",
       "import_pasted_cookies",
       "export_profile_cookies",
+      "local_storage::get_profile_local_storage_stats",
+      "local_storage::export_profile_storage_state",
+      "local_storage::import_profile_storage_state",
       "set_profile_password",
       "change_profile_password",
       "remove_profile_password",
diff --git a/e2e/tests/browser.test.mjs b/e2e/tests/browser.test.mjs
index 0c1bae16..892257af 100644
--- a/e2e/tests/browser.test.mjs
+++ b/e2e/tests/browser.test.mjs
@@ -705,7 +705,10 @@ test("real Wayfern fingerprinting, terms, API automation, CDP, cookies, and proc
     const inPlace = await agentClick({ role: "button", name: "Clicked" });
     assert.equal(inPlace.navigated, false);
     assert.ok(inPlace.ms < 5000, `an in-place click took ${inPlace.ms} ms`);
-    const link = await agentClick({ role: "link", name: "Open the linked page" });
+    const link = await agentClick({
+      role: "link",
+      name: "Open the linked page",
+    });
     assert.equal(link.navigated, true);
     assert.equal(
       await cdp.evaluate("document.querySelector('#path').textContent"),
@@ -1943,6 +1946,115 @@ test("a batch from a template makes numbered profiles, each with its own device"
   }
 });
 
+test("Local Storage that Donut writes, Wayfern reads, and what Wayfern writes exports", async () => {
+  assert.ok(process.env.WAYFERN_TEST_TOKEN, "WAYFERN_TEST_TOKEN is required");
+  const app = appFromEnvironment("browser-local-storage", {
+    seedVersionCache:
+      cachedFixtureVersion(process.env.DONUT_E2E_PROJECT_ROOT) ?? false,
+    wayfernTermsAccepted: false,
+  });
+  let browserPid;
+  try {
+    const prepared = await prepareWayfern(
+      app,
+      process.env.DONUT_E2E_PROJECT_ROOT,
+    );
+    if (!app.session) await app.start();
+    await app.invoke("accept_wayfern_terms");
+    const profile = await createRealProfile(
+      app,
+      prepared.version,
+      "Local Storage",
+    );
+    const origin = new URL(fixtureUrl).origin;
+    const imported = await app.invoke("import_profile_storage_state", {
+      profileId: profile.id,
+      content: JSON.stringify({
+        origins: [
+          {
+            origin,
+            localStorage: [
+              { name: "imported", value: "from Donut" },
+              { name: "unicode", value: "日本語 🍩" },
+            ],
+          },
+        ],
+      }),
+    });
+    assert.equal(imported.items, 2);
+
+    const launched = await app.invoke("launch_browser_profile", {
+      profile: (await app.invoke("list_browser_profiles")).find(
+        (p) => p.id === profile.id,
+      ),
+      url: `${fixtureUrl}/local-storage`,
+    });
+    browserPid = launched.process_id;
+    const port = processCommandLine(browserPid).match(
+      /--remote-debugging-port=(\d+)/,
+    )?.[1];
+    assert.ok(port, "the launch exposes a debugging port");
+    const cdp = await CdpClient.connect(Number(port));
+    await cdp.waitFor(`location.pathname === "/local-storage"`, {
+      description: "the fixture page",
+    });
+    assert.equal(
+      await cdp.evaluate("localStorage.getItem('imported')"),
+      "from Donut",
+    );
+    assert.equal(
+      await cdp.evaluate("localStorage.getItem('unicode')"),
+      "日本語 🍩",
+    );
+    await cdp.evaluate("localStorage.setItem('written', 'by Wayfern'); true");
+    // Chromium commits Local Storage to disk a few seconds after a change.
+    await new Promise((resolve) => setTimeout(resolve, 8_000));
+    cdp.close?.();
+
+    const running = (await app.invoke("list_browser_profiles")).find(
+      (p) => p.id === profile.id,
+    );
+    await app.invoke("kill_browser_profile", { profile: running });
+    await waitForProcessExit(app, browserPid);
+    browserPid = undefined;
+
+    const exported = JSON.parse(
+      await app.invoke("export_profile_storage_state", {
+        profileId: profile.id,
+        includeCookies: false,
+      }),
+    );
+    const site = exported.origins.find((o) => o.origin === origin);
+    assert.ok(
+      site,
+      `the fixture origin is exported: ${JSON.stringify(exported.origins)}`,
+    );
+    const items = Object.fromEntries(
+      site.localStorage.map((i) => [i.name, i.value]),
+    );
+    assert.equal(items.imported, "from Donut");
+    assert.equal(items.written, "by Wayfern");
+    await app.invoke("delete_profile", {
+      profileId: profile.id,
+      permanent: true,
+    });
+  } catch (error) {
+    await app.capture("failure");
+    throw error;
+  } finally {
+    if (app.session && browserPid && processExists(browserPid)) {
+      const running = (
+        await app.invoke("list_browser_profiles").catch(() => [])
+      ).find((item) => item.process_id === browserPid);
+      if (running)
+        await app
+          .invoke("kill_browser_profile", { profile: running })
+          .catch(() => {});
+    }
+    await app.close();
+  }
+});
+
 test("custom launch arguments reach only their Wayfern profile", async () => {
   assert.ok(process.env.WAYFERN_TEST_TOKEN, "WAYFERN_TEST_TOKEN is required");
   const app = appFromEnvironment("browser-launch-args", {
diff --git a/e2e/tests/entities.test.mjs b/e2e/tests/entities.test.mjs
index 45b0d7e3..5041073b 100644
--- a/e2e/tests/entities.test.mjs
+++ b/e2e/tests/entities.test.mjs
@@ -1354,6 +1354,155 @@ test("cookie import/copy/export, profile encryption, and traffic-stat read/clear
   });
 });
 
+test("a storage state file moves cookies and Local Storage into a closed profile and back out", async () => {
+  await withApp("entities-storage-state", async (app) => {
+    const profile = await createProfile(app, "Storage State");
+    assert.deepEqual(
+      await app.invoke("get_profile_local_storage_stats", {
+        profileId: profile.id,
+      }),
+      { origins: 0, items: 0 },
+      "a new profile has no Local Storage yet",
+    );
+
+    const state = {
+      cookies: [
+        {
+          name: "sid",
+          value: "storage-state-cookie",
+          domain: ".shop.example",
+          path: "/",
+          expires: 2_000_000_000,
+          httpOnly: true,
+          secure: true,
+          sameSite: "Lax",
+        },
+      ],
+      origins: [
+        {
+          origin: "https://shop.example",
+          localStorage: [
+            { name: "cart", value: "3 items" },
+            { name: "lang", value: "日本語" },
+          ],
+        },
+        // The same site spelled with its default port and a path.
+        {
+          origin: "https://SHOP.example:443/checkout",
+          localStorage: [{ name: "step", value: "2" }],
+        },
+        {
+          origin: "https://mail.example",
+          localStorage: [{ name: "token", value: "t" }],
+        },
+      ],
+    };
+    const imported = await app.invoke("import_profile_storage_state", {
+      profileId: profile.id,
+      content: JSON.stringify(state),
+    });
+    assert.equal(imported.origins, 2);
+    assert.equal(imported.items, 4);
+    assert.equal(imported.cookies_imported, 1);
+    assert.deepEqual(
+      await app.invoke("get_profile_local_storage_stats", {
+        profileId: profile.id,
+      }),
+      { origins: 2, items: 4 },
+    );
+
+    const exported = JSON.parse(
+      await app.invoke("export_profile_storage_state", {
+        profileId: profile.id,
+        includeCookies: true,
+      }),
+    );
+    const shop = exported.origins.find(
+      (o) => o.origin === "https://shop.example",
+    );
+    assert.deepEqual(
+      Object.fromEntries(shop.localStorage.map((i) => [i.name, i.value])),
+      { cart: "3 items", lang: "日本語", step: "2" },
+    );
+    const cookie = exported.cookies.find((c) => c.name === "sid");
+    assert.equal(cookie.value, "storage-state-cookie");
+    assert.equal(cookie.sameSite, "Lax");
+    assert.equal(cookie.httpOnly, true);
+    const withoutCookies = JSON.parse(
+      await app.invoke("export_profile_storage_state", {
+        profileId: profile.id,
+        includeCookies: false,
+      }),
+    );
+    assert.deepEqual(withoutCookies.cookies, []);
+
+    // A second import replaces an item by name and keeps the others.
+    await app.invoke("import_profile_storage_state", {
+      profileId: profile.id,
+      content: JSON.stringify({
+        origins: [
+          {
+            origin: "https://shop.example",
+            localStorage: [{ name: "cart", value: "empty" }],
+          },
+        ],
+      }),
+    });
+    const again = JSON.parse(
+      await app.invoke("export_profile_storage_state", {
+        profileId: profile.id,
+        includeCookies: false,
+      }),
+    );
+    const shopAgain = again.origins.find(
+      (o) => o.origin === "https://shop.example",
+    );
+    assert.equal(
+      shopAgain.localStorage.find((i) => i.name === "cart").value,
+      "empty",
+    );
+    assert.equal(shopAgain.localStorage.length, 3);
+
+    for (const [content, code] of [
+      ["not json", /STORAGE_STATE_INVALID/],
+      [
+        JSON.stringify({
+          origins: [{ origin: "file:///etc", localStorage: [] }],
+        }),
+        /LOCAL_STORAGE_ORIGIN_INVALID/,
+      ],
+    ]) {
+      assert.match(
+        await app.invokeError("import_profile_storage_state", {
+          profileId: profile.id,
+          content,
+        }),
+        code,
+      );
+    }
+
+    const ephemeral = await app.invoke("create_browser_profile_new", {
+      name: "Storage Ephemeral",
+      browserStr: "wayfern",
+      version: "150.0.7871.100",
+      releaseType: "stable",
+      proxyId: null,
+      vpnId: null,
+      wayfernConfig: { fingerprint: "{}" },
+      groupId: null,
+      ephemeral: true,
+      dnsBlocklist: null,
+      launchHook: null,
+    });
+    assert.match(
+      await app.invokeError("get_profile_local_storage_stats", {
+        profileId: ephemeral.id,
+      }),
+      /LOCAL_STORAGE_EPHEMERAL/,
+    );
+  });
+});
+
 test("2FA keys stay sealed on this device, hand out codes, and go with their profile", async () => {
   await withApp("entities-two-factor", async (app) => {
     const secret = "JBSWY3DPEHPK3PXP";
diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 1fcd1f3a..91171023 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -182,7 +182,7 @@ version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
 dependencies = [
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -193,7 +193,7 @@ checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
 dependencies = [
  "anstyle",
  "once_cell_polyfill",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1300,6 +1300,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "217698eaf96b4a3f0bc4f3662aaa55bdf913cd54d7204591faa790070c6d0853"
 
+[[package]]
+name = "crc32c"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a47af21622d091a8f0fb295b88bc886ac74efcc613efc19f5d0b21de5c89e47"
+dependencies = [
+ "rustc_version",
+]
+
 [[package]]
 name = "crc32fast"
 version = "1.5.2"
@@ -1649,7 +1658,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1773,6 +1782,7 @@ dependencies = [
  "resvg",
  "ring",
  "rusqlite",
+ "rusty-leveldb",
  "secret-service",
  "security-framework",
  "serde",
@@ -2027,6 +2037,17 @@ dependencies = [
  "typeid",
 ]
 
+[[package]]
+name = "errno"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f639046355ee4f37944e44f60642c6f3a7efa3cf6b78c78a0d989a8ce6c396a1"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.14"
@@ -2034,7 +2055,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
 ]
 
 [[package]]
@@ -2286,6 +2317,16 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fs2"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "futures"
 version = "0.3.34"
@@ -3291,6 +3332,12 @@ dependencies = [
  "hybrid-array",
 ]
 
+[[package]]
+name = "integer-encoding"
+version = "3.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8bb03732005da905c88227371639bf1ad885cc712789c011c31c5fb3ab3ccf02"
+
 [[package]]
 name = "interpolate_name"
 version = "0.2.4"
@@ -3914,7 +3961,7 @@ dependencies = [
  "png 0.18.1",
  "serde",
  "thiserror 2.0.21",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -4496,7 +4543,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d8fae84b431384b68627d0f9b3b1245fcf9f46f6c0e3dc902e9dce64edd1967"
 dependencies = [
  "libc",
- "windows-sys 0.45.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -5045,13 +5092,24 @@ version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
+[[package]]
+name = "rand"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e058c7de0b26af77780c769414d6257830bb240f3c38477dbc2c16e5f54d6d4c"
+dependencies = [
+ "libc",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "rand"
 version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9ef1d0d795eb7d84685bca4f72f3649f064e6641543d3a8c415898726a57b41"
 dependencies = [
- "rand_chacha",
+ "rand_chacha 0.9.0",
  "rand_core 0.9.5",
 ]
 
@@ -5066,6 +5124,16 @@ dependencies = [
  "rand_core 0.10.1",
 ]
 
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.9.0"
@@ -5128,7 +5196,7 @@ dependencies = [
  "paste",
  "profiling",
  "rand 0.9.5",
- "rand_chacha",
+ "rand_chacha 0.9.0",
  "simd_helpers",
  "thiserror 2.0.21",
  "v_frame",
@@ -5468,10 +5536,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "891efababe418670775f199f0d233d84843c227a0949a883ce15b37c78d6629d"
 dependencies = [
  "bitflags 2.13.2",
- "errno",
+ "errno 0.3.14",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -5513,6 +5581,21 @@ version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"
 
+[[package]]
+name = "rusty-leveldb"
+version = "4.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43ddda8f34100fca4bf1b0bbf743d12d27b5d84c35c74a52f392aac26f54e82d"
+dependencies = [
+ "bytes",
+ "crc32c",
+ "errno 0.2.8",
+ "fs2",
+ "integer-encoding",
+ "rand 0.8.8",
+ "snap",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.23"
@@ -6043,7 +6126,7 @@ version = "1.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4db69cba1110affc0e9f7bcd48bbf87b3f4fc7c61fc9155afd4c469eb3d6c1b"
 dependencies = [
- "errno",
+ "errno 0.3.14",
  "libc",
 ]
 
@@ -6134,6 +6217,12 @@ dependencies = [
  "managed",
 ]
 
+[[package]]
+name = "snap"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "199905e6153d6405f9728fe44daace35f8f837bbf830bb6e85fbd5828709a886"
+
 [[package]]
 name = "socket2"
 version = "0.6.5"
@@ -6141,7 +6230,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3d1e2c7f27f8d4cb10542a02c49005dbd6e93095799d6f3be745fae9f8fedd4"
 dependencies = [
  "libc",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -6898,10 +6987,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32497e9a4c7b38532efcdebeef879707aa9f794296a4f0244f6f69e9bc8574bd"
 dependencies = [
  "fastrand",
- "getrandom 0.3.4",
+ "getrandom 0.4.3",
  "once_cell",
  "rustix",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -7387,7 +7476,7 @@ dependencies = [
  "png 0.18.1",
  "serde",
  "thiserror 2.0.21",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -7466,7 +7555,7 @@ checksum = "f2f6fb2847f6742cd76af783a2a2c49e9375d0a111c7bef6f71cd9e738c72d6e"
 dependencies = [
  "memoffset",
  "tempfile",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -8017,7 +8106,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -8038,7 +8127,7 @@ dependencies = [
  "objc2-foundation",
  "objc2-quartz-core",
  "raw-window-handle",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
  "windows-version",
 ]
 
@@ -8419,7 +8508,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d6f32a0ff4a9f6f01231eb2059cc85479330739333e0e58cadf03b6af2cca10"
 dependencies = [
  "cfg-if",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index b6d6244c..a3252b56 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -132,6 +132,7 @@ crossbeam-channel = "0.5"
 sys-locale = "0.3"
 jsonc-parser = { version = "0.34", features = ["cst", "serde_json"] }
 toml_edit = "0.25"
+rusty-leveldb = "4.0.1"
 
 [target.'cfg(unix)'.dependencies]
 nix = { version = "0.31", features = ["signal", "process"] }
diff --git a/src-tauri/src/api_server.rs b/src-tauri/src/api_server.rs
index c5d2f4dd..9b17c09c 100644
--- a/src-tauri/src/api_server.rs
+++ b/src-tauri/src/api_server.rs
@@ -274,6 +274,24 @@ impl From<crate::profile_statuses::ProfileStatus> for ApiStatusResponse {
   }
 }
 
+/// Playwright's `storageState`: cookies and each origin's Local Storage.
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+struct ApiStorageState {
+  /// Playwright cookies (`name`, `value`, `domain`, `path`, `expires`,
+  /// `httpOnly`, `secure`, `sameSite`).
+  #[serde(default)]
+  #[schema(value_type = Vec<Object>)]
+  cookies: Vec<serde_json::Value>,
+  #[serde(default)]
+  origins: Vec<crate::local_storage::OriginStorage>,
+}
+
+#[derive(Debug, Deserialize)]
+struct StorageStateQuery {
+  #[serde(default)]
+  include_cookies: bool,
+}
+
 #[derive(Debug, Deserialize, ToSchema)]
 struct TemplateRequest {
   /// 1 to 60 characters, unique (case-insensitive).
@@ -762,6 +780,8 @@ struct ImportProxiesResponse {
     detect_import_profiles,
     import_profiles_api,
     import_profile_cookies,
+    export_storage_state,
+    import_storage_state,
     get_groups,
     get_group,
     create_group,
@@ -884,6 +904,10 @@ struct ImportProxiesResponse {
     crate::proxy_distribution::ProxyAssignmentResult,
     OpenUrlRequest,
     ImportCookiesRequest,
+    ApiStorageState,
+    crate::local_storage::OriginStorage,
+    crate::local_storage::StorageItem,
+    crate::local_storage::StorageStateImport,
     ImportCookiesResponse,
     CreateExtensionRequest,
     UpdateExtensionRequest,
@@ -1120,6 +1144,7 @@ fn build_v1_router() -> Router<ApiServerState> {
     .routes(routes!(detect_import_profiles))
     .routes(routes!(import_profiles_api))
     .routes(routes!(import_profile_cookies))
+    .routes(routes!(export_storage_state, import_storage_state))
     .routes(routes!(get_groups, create_group))
     .routes(routes!(get_group, update_group, delete_group))
     .routes(routes!(get_statuses, create_status))
@@ -1440,7 +1465,12 @@ fn manager_error_response(err: impl std::fmt::Display) -> (StatusCode, String) {
     if let Some(code) = value.get("code").and_then(|c| c.as_str()) {
       let status = if code.ends_with("_NOT_FOUND") {
         StatusCode::NOT_FOUND
-      } else if LAUNCH_CONFLICT_CODES.contains(&code) || code == "BULK_CREATE_BUSY" {
+      } else if LAUNCH_CONFLICT_CODES.contains(&code)
+        || code == "BULK_CREATE_BUSY"
+        || code == "LOCAL_STORAGE_BROWSER_RUNNING"
+        || code == "LOCAL_STORAGE_REMOTE_SESSION"
+        || code == "LOCAL_STORAGE_PROFILE_PROTECTED"
+      {
         // Someone or something else holds this profile: another team member, a
         // browser already open, or a remote session whose work has not been
         // pulled back yet. All of them are "try again later", not "your request
@@ -4953,6 +4983,74 @@ async fn import_profiles_api(
     .map_err(manager_error_response)
 }
 
+#[utoipa::path(
+  get,
+  path = "/v1/profiles/{id}/storage-state",
+  params(
+    ("id" = String, Path, description = "Profile ID"),
+    ("include_cookies" = Option<bool>, Query, description = "Also export the profile's cookies; false when left out")
+  ),
+  responses(
+    (status = 200, description = "Playwright storageState: each origin's Local Storage, and the cookies when asked for. Readable while the browser runs; writes from the last seconds may not be on disk yet", body = ApiStorageState),
+    (status = 400, description = "The profile is ephemeral and keeps no Local Storage on disk"),
+    (status = 401, description = "Unauthorized"),
+    (status = 404, description = "Profile not found"),
+    (status = 409, description = "The profile is password-protected"),
+    (status = 500, description = "Internal server error")
+  ),
+  security(
+    ("bearer_auth" = [])
+  ),
+  tag = "cookies"
+)]
+async fn export_storage_state(
+  Path(id): Path<String>,
+  Query(query): Query<StorageStateQuery>,
+) -> Result<Json<ApiStorageState>, (StatusCode, String)> {
+  let text = tokio::task::spawn_blocking(move || {
+    crate::local_storage::export_storage_state(&id, query.include_cookies)
+  })
+  .await
+  .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?
+  .map_err(manager_error_response)?;
+  serde_json::from_str(&text)
+    .map(Json)
+    .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))
+}
+
+#[utoipa::path(
+  post,
+  path = "/v1/profiles/{id}/storage-state",
+  params(
+    ("id" = String, Path, description = "Profile ID")
+  ),
+  request_body = ApiStorageState,
+  responses(
+    (status = 200, description = "Imported. An item replaces the one of the same name; the origin's other items stay", body = crate::local_storage::StorageStateImport),
+    (status = 400, description = "Not a storageState, an origin that is not http(s), more than 10 MiB for one origin, or an ephemeral profile"),
+    (status = 401, description = "Unauthorized"),
+    (status = 404, description = "Profile not found"),
+    (status = 409, description = "The browser is running, the profile is password-protected, or a remote session owns it"),
+    (status = 500, description = "Internal server error")
+  ),
+  security(
+    ("bearer_auth" = [])
+  ),
+  tag = "cookies"
+)]
+async fn import_storage_state(
+  State(state): State<ApiServerState>,
+  Path(id): Path<String>,
+  Json(body): Json<ApiStorageState>,
+) -> Result<Json<crate::local_storage::StorageStateImport>, (StatusCode, String)> {
+  let content =
+    serde_json::to_string(&body).map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?;
+  crate::local_storage::import_storage_state(&state.app_handle, &id, &content)
+    .await
+    .map(Json)
+    .map_err(manager_error_response)
+}
+
 #[utoipa::path(
   post,
   path = "/v1/profiles/{id}/cookies/import",
@@ -6195,6 +6293,23 @@ mod tests {
     assert!(spec["paths"]["/v1/templates/{id}/profiles"]["post"]["responses"]["429"].is_object());
   }
 
+  #[test]
+  fn openapi_documents_the_storage_state() {
+    let spec = serde_json::to_value(ApiDoc::openapi()).expect("spec serializes");
+    let path = &spec["paths"]["/v1/profiles/{id}/storage-state"];
+    assert!(path["get"].is_object() && path["post"].is_object());
+    assert!(path["post"]["responses"]["409"].is_object());
+    let origin = &spec["components"]["schemas"]["OriginStorage"];
+    assert!(
+      origin["properties"]["localStorage"].is_object(),
+      "Playwright's spelling"
+    );
+    assert!(
+      schema_required(&spec, "ApiStorageState").is_empty(),
+      "cookies and origins may each be left out"
+    );
+  }
+
   #[test]
   fn openapi_documents_the_profile_dns_server() {
     let spec = serde_json::to_value(ApiDoc::openapi()).expect("spec serializes");
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 7d1da967..fcb9fb28 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -148,6 +148,7 @@ mod cookie_bot;
 mod cookie_manager;
 mod cookie_paste;
 pub mod events;
+mod local_storage;
 mod mcp_integrations;
 mod mcp_remote;
 mod mcp_server;
@@ -3539,6 +3540,9 @@ pub fn run_with_builder(
       add_mcp_to_agent,
       remove_mcp_from_agent,
       set_mcp_toolsets,
+      local_storage::get_profile_local_storage_stats,
+      local_storage::export_profile_storage_state,
+      local_storage::import_profile_storage_state,
       start_mcp_remote_bridge,
       stop_mcp_remote_bridge,
       get_mcp_remote_status,
diff --git a/src-tauri/src/local_storage.rs b/src-tauri/src/local_storage.rs
new file mode 100644
index 00000000..653eb2c4
--- /dev/null
+++ b/src-tauri/src/local_storage.rs
@@ -0,0 +1,627 @@
+//! A profile's Local Storage, read and written in the shape of Playwright's
+//! `storageState`, so a signed-in session moves between Donut and automation
+//! tools: `{ "cookies": [...], "origins": [{ "origin", "localStorage": [...] }] }`.
+//!
+//! Chromium keeps Local Storage in a LevelDB under
+//! `Default/Local Storage/leveldb`:
+//!
+//! - `VERSION` is `1`;
+//! - `META:<origin>` holds when the origin's data last changed and its size,
+//!   `METAACCESS:<origin>` when it was last read (small protobufs);
+//! - `_<origin>\0<key>` holds a value. A key and a value each start with a
+//!   format byte: `0` for UTF-16LE, `1` for Latin-1.
+//!
+//! A read opens a copy of the folder, so it never changes the profile. A write
+//! needs the browser closed: a running browser holds the database and would
+//! lose the write or corrupt the files.
+
+use crate::profile::{BrowserProfile, ProfileManager};
+use rusty_leveldb::{CompressorId, LdbIterator, Options, WriteBatch, DB};
+use serde::{Deserialize, Serialize};
+use std::path::{Path, PathBuf};
+
+/// The most an import may carry, cookies included.
+pub const MAX_IMPORT_BYTES: usize = 32 * 1024 * 1024;
+/// Chromium's own limit per origin: five million UTF-16 code units.
+const MAX_ORIGIN_BYTES: u64 = 10 * 1024 * 1024;
+const MAX_ORIGINS: usize = 10_000;
+/// Seconds from 1601-01-01 (Chromium's time origin) to the Unix epoch.
+const CHROMIUM_EPOCH_OFFSET_SECS: i64 = 11_644_473_600;
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, utoipa::ToSchema)]
+pub struct StorageItem {
+  pub name: String,
+  pub value: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, utoipa::ToSchema)]
+pub struct OriginStorage {
+  /// `https://example.com`, the way a page's `origin` reads.
+  pub origin: String,
+  #[serde(rename = "localStorage", default)]
+  pub local_storage: Vec<StorageItem>,
+}
+
+#[derive(Debug, Clone, Serialize, utoipa::ToSchema)]
+pub struct LocalStorageStats {
+  pub origins: usize,
+  pub items: usize,
+}
+
+#[derive(Debug, Clone, Serialize, utoipa::ToSchema)]
+pub struct StorageStateImport {
+  pub origins: usize,
+  pub items: usize,
+  pub cookies_imported: usize,
+  pub cookies_replaced: usize,
+  /// Codes of the cookies that could not be imported.
+  pub cookie_errors: Vec<String>,
+}
+
+#[derive(Debug, Deserialize)]
+struct StorageState {
+  #[serde(default)]
+  origins: Vec<OriginStorage>,
+  #[serde(default)]
+  cookies: Vec<serde_json::Value>,
+}
+
+fn code(code: &str) -> String {
+  crate::backend_error(code)
+}
+
+fn database_dir(profile: &BrowserProfile) -> PathBuf {
+  profile
+    .get_profile_data_path(&ProfileManager::instance().get_profiles_dir())
+    .join("Default")
+    .join("Local Storage")
+    .join("leveldb")
+}
+
+/// The profile, when its Local Storage can be read at all: an ephemeral
+/// profile keeps none on disk, and a password-protected one keeps it sealed.
+fn readable_profile(profile_id: &str) -> Result<BrowserProfile, String> {
+  let profile = ProfileManager::instance()
+    .list_profiles()
+    .map_err(|e| crate::wrap_backend_error(e, "Failed to list profiles"))?
+    .into_iter()
+    .find(|profile| profile.id.to_string() == profile_id)
+    .ok_or_else(|| code("PROFILE_NOT_FOUND"))?;
+  if profile.ephemeral {
+    return Err(code("LOCAL_STORAGE_EPHEMERAL"));
+  }
+  if profile.password_protected {
+    return Err(code("LOCAL_STORAGE_PROFILE_PROTECTED"));
+  }
+  Ok(profile)
+}
+
+// --- The database format ----------------------------------------------------
+
+fn decode_string(bytes: &[u8]) -> Option<String> {
+  let (format, rest) = bytes.split_first()?;
+  match format {
+    0 => {
+      if rest.len() % 2 != 0 {
+        return None;
+      }
+      let units: Vec<u16> = rest
+        .chunks_exact(2)
+        .map(|pair| u16::from_le_bytes([pair[0], pair[1]]))
+        .collect();
+      String::from_utf16(&units).ok()
+    }
+    1 => Some(rest.iter().map(|&b| char::from(b)).collect()),
+    _ => None,
+  }
+}
+
+/// Latin-1 when every character fits, as Chromium writes it; else UTF-16LE.
+fn encode_string(text: &str) -> Vec<u8> {
+  if text.chars().all(|c| (c as u32) <= 0xFF) {
+    let mut out = Vec::with_capacity(text.len() + 1);
+    out.push(1);
+    out.extend(text.chars().map(|c| c as u8));
+    out
+  } else {
+    let mut out = Vec::with_capacity(text.len() * 2 + 1);
+    out.push(0);
+    for unit in text.encode_utf16() {
+      out.extend_from_slice(&unit.to_le_bytes());
+    }
+    out
+  }
+}
+
+fn data_prefix(origin: &str) -> Vec<u8> {
+  let mut key = Vec::with_capacity(origin.len() + 2);
+  key.push(b'_');
+  key.extend_from_slice(origin.as_bytes());
+  key.push(0);
+  key
+}
+
+fn data_key(origin: &str, name: &str) -> Vec<u8> {
+  let mut key = data_prefix(origin);
+  key.extend(encode_string(name));
+  key
+}
+
+/// `(origin, name)` from a data key, or `None` for any other entry.
+fn parse_data_key(key: &[u8]) -> Option<(String, String)> {
+  let rest = key.strip_prefix(b"_")?;
+  let split = rest.iter().position(|&b| b == 0)?;
+  let origin = std::str::from_utf8(&rest[..split]).ok()?.to_string();
+  let name = decode_string(&rest[split + 1..])?;
+  Some((origin, name))
+}
+
+fn varint(mut value: u64, out: &mut Vec<u8>) {
+  while value >= 0x80 {
+    out.push((value as u8) | 0x80);
+    value >>= 7;
+  }
+  out.push(value as u8);
+}
+
+/// Microseconds since 1601-01-01, Chromium's `Time` internal value.
+fn chromium_now() -> i64 {
+  let unix_micros = std::time::SystemTime::now()
+    .duration_since(std::time::UNIX_EPOCH)
+    .map_or(0, |d| d.as_micros() as i64);
+  unix_micros + CHROMIUM_EPOCH_OFFSET_SECS * 1_000_000
+}
+
+/// `LocalStorageAreaWriteMetaData { last_modified = 1; size_bytes = 2; }`.
+fn write_meta(last_modified: i64, size_bytes: u64) -> Vec<u8> {
+  let mut out = vec![0x08];
+  varint(last_modified as u64, &mut out);
+  out.push(0x10);
+  varint(size_bytes, &mut out);
+  out
+}
+
+/// `LocalStorageAreaAccessMetaData { last_accessed = 1; }`.
+fn access_meta(last_accessed: i64) -> Vec<u8> {
+  let mut out = vec![0x08];
+  varint(last_accessed as u64, &mut out);
+  out
+}
+
+/// What an item weighs against the per-origin limit: UTF-16 code units, two
+/// bytes each, the way Chromium counts.
+fn item_bytes(name: &str, value: &str) -> u64 {
+  ((name.encode_utf16().count() + value.encode_utf16().count()) * 2) as u64
+}
+
+fn open(dir: &Path) -> Result<DB, String> {
+  let options = Options {
+    compressor: rusty_leveldb::compressor::SnappyCompressor::ID,
+    ..Options::default()
+  };
+  DB::open(dir, options).map_err(|e| e.to_string())
+}
+
+fn read_database(dir: &Path) -> Result<Vec<OriginStorage>, String> {
+  let mut db = open(dir)?;
+  let mut iter = db.new_iter().map_err(|e| e.to_string())?;
+  let mut origins: Vec<OriginStorage> = Vec::new();
+  iter.seek(b"_");
+  while iter.valid() {
+    let Some((key, value)) = iter.current() else {
+      break;
+    };
+    if !key.starts_with(b"_") {
+      break;
+    }
+    if let (Some((origin, name)), Some(value)) = (parse_data_key(&key), decode_string(&value)) {
+      match origins.last_mut() {
+        Some(last) if last.origin == origin => last.local_storage.push(StorageItem { name, value }),
+        _ => origins.push(OriginStorage {
+          origin,
+          local_storage: vec![StorageItem { name, value }],
+        }),
+      }
+    }
+    if !iter.advance() {
+      break;
+    }
+  }
+  drop(iter);
+  let _ = db.close();
+  Ok(origins)
+}
+
+/// Write `origins` into the database at `dir`, creating it when the profile
+/// has none yet. An item replaces the one of the same name; the origin's
+/// other items stay.
+fn write_database(dir: &Path, origins: &[OriginStorage]) -> Result<(), String> {
+  std::fs::create_dir_all(dir).map_err(|e| e.to_string())?;
+  let mut db = open(dir)?;
+  let now = chromium_now();
+  if db.get(b"VERSION").is_none() {
+    db.put(b"VERSION", b"1").map_err(|e| e.to_string())?;
+  }
+  for origin in origins {
+    let mut batch = WriteBatch::default();
+    for item in &origin.local_storage {
+      batch.put(
+        &data_key(&origin.origin, &item.name),
+        &encode_string(&item.value),
+      );
+    }
+    db.write(batch, false).map_err(|e| e.to_string())?;
+
+    let prefix = data_prefix(&origin.origin);
+    let mut size = 0u64;
+    let mut iter = db.new_iter().map_err(|e| e.to_string())?;
+    iter.seek(&prefix);
+    while iter.valid() {
+      let Some((key, value)) = iter.current() else {
+        break;
+      };
+      if !key.starts_with(&prefix) {
+        break;
+      }
+      if let (Some((_, name)), Some(value)) = (parse_data_key(&key), decode_string(&value)) {
+        size += item_bytes(&name, &value);
+      }
+      if !iter.advance() {
+        break;
+      }
+    }
+    drop(iter);
+    if size > MAX_ORIGIN_BYTES {
+      return Err(
+        serde_json::json!({
+          "code": "LOCAL_STORAGE_ORIGIN_TOO_LARGE",
+          "params": { "origin": origin.origin }
+        })
+        .to_string(),
+      );
+    }
+    let meta_key = format!("META:{}", origin.origin);
+    let access_key = format!("METAACCESS:{}", origin.origin);
+    db.put(meta_key.as_bytes(), &write_meta(now, size))
+      .map_err(|e| e.to_string())?;
+    db.put(access_key.as_bytes(), &access_meta(now))
+      .map_err(|e| e.to_string())?;
+  }
+  db.flush().map_err(|e| e.to_string())?;
+  db.close().map_err(|e| e.to_string())
+}
+
+/// A copy of the folder to read from, without the browser's lock file.
+fn copy_database(from: &Path) -> Result<Option<tempfile::TempDir>, String> {
+  if !from.exists() {
+    return Ok(None);
+  }
+  let copy = tempfile::tempdir().map_err(|e| e.to_string())?;
+  for entry in std::fs::read_dir(from).map_err(|e| e.to_string())? {
+    let entry = entry.map_err(|e| e.to_string())?;
+    let name = entry.file_name();
+    if name == "LOCK" || !entry.path().is_file() {
+      continue;
+    }
+    std::fs::copy(entry.path(), copy.path().join(&name)).map_err(|e| e.to_string())?;
+  }
+  Ok(Some(copy))
+}
+
+/// `https://example.com`, from whatever spelling of an origin was imported.
+fn normalized_origin(raw: &str) -> Result<String, String> {
+  let invalid = || {
+    serde_json::json!({
+      "code": "LOCAL_STORAGE_ORIGIN_INVALID",
+      "params": { "origin": raw.chars().take(200).collect::<String>() }
+    })
+    .to_string()
+  };
+  let url = url::Url::parse(raw.trim()).map_err(|_| invalid())?;
+  if !matches!(url.scheme(), "http" | "https") {
+    return Err(invalid());
+  }
+  let origin = url.origin();
+  if !origin.is_tuple() {
+    return Err(invalid());
+  }
+  Ok(origin.ascii_serialization())
+}
+
+// --- What the app and the API call -----------------------------------------
+
+pub fn read(profile_id: &str) -> Result<Vec<OriginStorage>, String> {
+  let profile = readable_profile(profile_id)?;
+  let Some(copy) = copy_database(&database_dir(&profile))? else {
+    return Ok(Vec::new());
+  };
+  read_database(copy.path())
+    .map_err(|e| crate::backend_error_with_detail("LOCAL_STORAGE_UNREADABLE", e))
+}
+
+pub fn stats(profile_id: &str) -> Result<LocalStorageStats, String> {
+  let origins = read(profile_id)?;
+  Ok(LocalStorageStats {
+    origins: origins.len(),
+    items: origins.iter().map(|o| o.local_storage.len()).sum(),
+  })
+}
+
+/// Playwright's cookie shape from a stored cookie.
+fn playwright_cookie(cookie: &crate::cookie_manager::UnifiedCookie) -> serde_json::Value {
+  let same_site = match cookie.same_site {
+    0 => "None",
+    2 => "Strict",
+    // Unspecified behaves as Lax in Chromium, so Lax is what it travels as.
+    _ => "Lax",
+  };
+  serde_json::json!({
+    "name": cookie.name,
+    "value": cookie.value,
+    "domain": cookie.domain,
+    "path": cookie.path,
+    "expires": if cookie.expires == 0 { -1 } else { cookie.expires },
+    "httpOnly": cookie.is_http_only,
+    "secure": cookie.is_secure,
+    "sameSite": same_site,
+  })
+}
+
+pub fn export_storage_state(profile_id: &str, include_cookies: bool) -> Result<String, String> {
+  let origins = read(profile_id)?;
+  let cookies: Vec<serde_json::Value> = if include_cookies {
+    crate::cookie_manager::CookieManager::read_cookies(profile_id)
+      .map_err(|e| crate::backend_error_with_detail("COOKIE_DB_UNAVAILABLE", e))?
+      .domains
+      .iter()
+      .flat_map(|domain| domain.cookies.iter().map(playwright_cookie))
+      .collect()
+  } else {
+    Vec::new()
+  };
+  let count: usize = origins.iter().map(|o| o.local_storage.len()).sum();
+  log::info!(
+    "Storage state exported profile={profile_id} origins={} items={count} cookies={}",
+    origins.len(),
+    cookies.len()
+  );
+  serde_json::to_string_pretty(&serde_json::json!({ "cookies": cookies, "origins": origins }))
+    .map_err(|e| e.to_string())
+}
+
+/// Check and tidy what an import carries, before anything is written.
+fn checked_origins(origins: Vec<OriginStorage>) -> Result<Vec<OriginStorage>, String> {
+  if origins.len() > MAX_ORIGINS {
+    return Err(code("LOCAL_STORAGE_TOO_MANY_ORIGINS"));
+  }
+  let mut merged: Vec<OriginStorage> = Vec::new();
+  for origin in origins {
+    let name = normalized_origin(&origin.origin)?;
+    let size: u64 = origin
+      .local_storage
+      .iter()
+      .map(|item| item_bytes(&item.name, &item.value))
+      .sum();
+    if size > MAX_ORIGIN_BYTES {
+      return Err(
+        serde_json::json!({
+          "code": "LOCAL_STORAGE_ORIGIN_TOO_LARGE",
+          "params": { "origin": name }
+        })
+        .to_string(),
+      );
+    }
+    match merged.iter_mut().find(|o| o.origin == name) {
+      Some(existing) => existing.local_storage.extend(origin.local_storage),
+      None => merged.push(OriginStorage {
+        origin: name,
+        local_storage: origin.local_storage,
+      }),
+    }
+  }
+  Ok(merged)
+}
+
+pub async fn import_storage_state(
+  app_handle: &tauri::AppHandle,
+  profile_id: &str,
+  content: &str,
+) -> Result<StorageStateImport, String> {
+  if content.len() > MAX_IMPORT_BYTES {
+    return Err(code("LOCAL_STORAGE_IMPORT_TOO_LARGE"));
+  }
+  let state: StorageState =
+    serde_json::from_str(content).map_err(|_| code("STORAGE_STATE_INVALID"))?;
+  let profile = readable_profile(profile_id)?;
+  let running = ProfileManager::instance()
+    .check_browser_status(app_handle.clone(), &profile)
+    .await
+    .unwrap_or(false);
+  if running {
+    return Err(code("LOCAL_STORAGE_BROWSER_RUNNING"));
+  }
+  if crate::remote_handoff::state_for(profile_id).is_some() {
+    return Err(code("LOCAL_STORAGE_REMOTE_SESSION"));
+  }
+  let origins = checked_origins(state.origins)?;
+  let items: usize = origins.iter().map(|o| o.local_storage.len()).sum();
+
+  let (mut cookies_imported, mut cookies_replaced, mut cookie_errors) = (0, 0, Vec::new());
+  if !state.cookies.is_empty() {
+    let cookies = serde_json::json!({ "cookies": state.cookies }).to_string();
+    let result =
+      crate::cookie_manager::CookieManager::import_cookies(app_handle, profile_id, &cookies)
+        .await?;
+    cookies_imported = result.cookies_imported;
+    cookies_replaced = result.cookies_replaced;
+    cookie_errors = result.errors;
+  }
+
+  if !origins.is_empty() {
+    let dir = database_dir(&profile);
+    let to_write = origins.clone();
+    tauri::async_runtime::spawn_blocking(move || write_database(&dir, &to_write))
+      .await
+      .map_err(|e| crate::backend_error_with_detail("INTERNAL_ERROR", e))?
+      .map_err(|e| {
+        if e.starts_with('{') {
+          e
+        } else {
+          crate::backend_error_with_detail("LOCAL_STORAGE_UNWRITABLE", e)
+        }
+      })?;
+  }
+  log::info!(
+    "Storage state imported profile={profile_id} origins={} items={items} cookies={cookies_imported}",
+    origins.len()
+  );
+  Ok(StorageStateImport {
+    origins: origins.len(),
+    items,
+    cookies_imported,
+    cookies_replaced,
+    cookie_errors,
+  })
+}
+
+#[tauri::command]
+pub async fn get_profile_local_storage_stats(
+  profile_id: String,
+) -> Result<LocalStorageStats, String> {
+  tauri::async_runtime::spawn_blocking(move || stats(&profile_id))
+    .await
+    .map_err(|e| crate::backend_error_with_detail("INTERNAL_ERROR", e))?
+}
+
+#[tauri::command]
+pub async fn export_profile_storage_state(
+  profile_id: String,
+  include_cookies: bool,
+) -> Result<String, String> {
+  tauri::async_runtime::spawn_blocking(move || export_storage_state(&profile_id, include_cookies))
+    .await
+    .map_err(|e| crate::backend_error_with_detail("INTERNAL_ERROR", e))?
+}
+
+#[tauri::command]
+pub async fn import_profile_storage_state(
+  app_handle: tauri::AppHandle,
+  profile_id: String,
+  content: String,
+) -> Result<StorageStateImport, String> {
+  import_storage_state(&app_handle, &profile_id, &content).await
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn strings_round_trip_in_both_formats() {
+    for text in ["plain", "", "ümlaut ÿ", "日本語 🍩"] {
+      let encoded = encode_string(text);
+      assert_eq!(decode_string(&encoded).as_deref(), Some(text));
+    }
+    assert_eq!(encode_string("ab")[0], 1, "Latin-1 when it fits");
+    assert_eq!(encode_string("日")[0], 0, "UTF-16 when it does not");
+    assert_eq!(decode_string(&[0, 1]), None, "an odd UTF-16 length");
+    assert_eq!(decode_string(&[9, 1]), None);
+  }
+
+  #[test]
+  fn a_data_key_names_its_origin_and_item() {
+    let key = data_key("https://example.com", "token");
+    assert!(key.starts_with(b"_https://example.com\0\x01"));
+    assert_eq!(
+      parse_data_key(&key),
+      Some(("https://example.com".to_string(), "token".to_string()))
+    );
+    assert_eq!(parse_data_key(b"META:https://example.com"), None);
+  }
+
+  #[test]
+  fn meta_is_the_protobuf_chromium_reads() {
+    assert_eq!(write_meta(1, 300), vec![0x08, 0x01, 0x10, 0xAC, 0x02]);
+    assert_eq!(access_meta(150), vec![0x08, 0x96, 0x01]);
+  }
+
+  #[test]
+  fn a_written_database_reads_back_and_keeps_other_items() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = dir.path().join("leveldb");
+    let item = |name: &str, value: &str| StorageItem {
+      name: name.to_string(),
+      value: value.to_string(),
+    };
+    write_database(
+      &path,
+      &[OriginStorage {
+        origin: "https://shop.example".to_string(),
+        local_storage: vec![item("cart", "3 items"), item("lang", "日本語")],
+      }],
+    )
+    .unwrap();
+    write_database(
+      &path,
+      &[
+        OriginStorage {
+          origin: "https://shop.example".to_string(),
+          local_storage: vec![item("cart", "empty")],
+        },
+        OriginStorage {
+          origin: "https://mail.example".to_string(),
+          local_storage: vec![item("session", "abc")],
+        },
+      ],
+    )
+    .unwrap();
+    let copy = copy_database(&path).unwrap().unwrap();
+    let read = read_database(copy.path()).unwrap();
+    assert_eq!(read.len(), 2);
+    let shop = read
+      .iter()
+      .find(|o| o.origin == "https://shop.example")
+      .unwrap();
+    assert_eq!(
+      shop.local_storage,
+      vec![item("cart", "empty"), item("lang", "日本語")]
+    );
+    let mut db = open(&path).unwrap();
+    assert_eq!(db.get(b"VERSION").as_deref(), Some(&b"1"[..]));
+    assert!(db.get(b"META:https://mail.example").is_some());
+  }
+
+  #[test]
+  fn imported_origins_are_checked_and_spelled_as_a_page_reads_them() {
+    let origin = |name: &str| OriginStorage {
+      origin: name.to_string(),
+      local_storage: vec![StorageItem {
+        name: "k".to_string(),
+        value: "v".to_string(),
+      }],
+    };
+    let tidy = checked_origins(vec![
+      origin("https://Example.com:443/path"),
+      origin("https://example.com"),
+    ])
+    .unwrap();
+    assert_eq!(tidy.len(), 1);
+    assert_eq!(tidy[0].origin, "https://example.com");
+    assert_eq!(tidy[0].local_storage.len(), 2);
+    for bad in ["file:///etc", "javascript:alert(1)", "not a url"] {
+      assert!(checked_origins(vec![origin(bad)])
+        .unwrap_err()
+        .contains("LOCAL_STORAGE_ORIGIN_INVALID"));
+    }
+    let huge = OriginStorage {
+      origin: "https://big.example".to_string(),
+      local_storage: vec![StorageItem {
+        name: "k".to_string(),
+        value: "x".repeat(6_000_000),
+      }],
+    };
+    assert!(checked_origins(vec![huge])
+      .unwrap_err()
+      .contains("LOCAL_STORAGE_ORIGIN_TOO_LARGE"));
+  }
+}
diff --git a/src-tauri/src/proxy_manager.rs b/src-tauri/src/proxy_manager.rs
index 25223549..ae124807 100644
--- a/src-tauri/src/proxy_manager.rs
+++ b/src-tauri/src/proxy_manager.rs
@@ -3209,6 +3209,7 @@ mod tests {
     proxy_path: &std::path::Path,
   ) -> Result<(std::process::ExitStatus, String, Duration), Box<dyn std::error::Error>> {
     let stdout = tempfile::NamedTempFile::new()?;
+    let stderr = tempfile::NamedTempFile::new()?;
     let mut cmd = Command::new(proxy_path);
     cmd
       .args([
@@ -3221,13 +3222,29 @@ mod tests {
         "--type",
         "http",
       ])
+      .env("RUST_LOG", "debug")
       .stdin(Stdio::null())
       .stdout(Stdio::from(stdout.reopen()?))
-      .stderr(Stdio::null());
+      .stderr(Stdio::from(stderr.reopen()?))
+      .kill_on_drop(true);
     let started = std::time::Instant::now();
-    let status = tokio::time::timeout(CLI_EXIT_LIMIT, cmd.status())
-      .await
-      .map_err(|_| "CLI command timed out - this indicates improper detachment")??;
+    let mut child = cmd.spawn()?;
+    let status = match tokio::time::timeout(CLI_EXIT_LIMIT, child.wait()).await {
+      Ok(status) => status?,
+      Err(_) => {
+        let _ = child.kill().await;
+        let log = std::fs::read_to_string(stderr.path()).unwrap_or_default();
+        let tail: Vec<&str> = log.lines().rev().take(25).collect();
+        let tail: Vec<&str> = tail.into_iter().rev().collect();
+        return Err(
+          format!(
+            "CLI command timed out - this indicates improper detachment. Its log:\n{}",
+            tail.join("\n")
+          )
+          .into(),
+        );
+      }
+    };
     Ok((
       status,
       std::fs::read_to_string(stdout.path())?,
diff --git a/src/components/profile-info-dialog.tsx b/src/components/profile-info-dialog.tsx
index 3b4bc232..8f8509ae 100644
--- a/src/components/profile-info-dialog.tsx
+++ b/src/components/profile-info-dialog.tsx
@@ -2,8 +2,8 @@
 
 import { invoke } from "@tauri-apps/api/core";
 import { listen } from "@tauri-apps/api/event";
-import { save } from "@tauri-apps/plugin-dialog";
-import { writeTextFile } from "@tauri-apps/plugin-fs";
+import { open as openDialog, save } from "@tauri-apps/plugin-dialog";
+import { readTextFile, writeTextFile } from "@tauri-apps/plugin-fs";
 import { hideOthers } from "aria-hidden";
 import Color from "color";
 import { motion, useReducedMotion } from "motion/react";
@@ -2403,6 +2403,13 @@ function CookiesSectionInline({
                   : "—"}
             </p>
           </div>
+          {profile.ephemeral !== true && !profile.password_protected && (
+            <StorageStateBlock
+              profile={profile}
+              isDisabled={isDisabled}
+              t={t}
+            />
+          )}
           {domains.length > 0 && (
             <div className="flex min-h-0 flex-1 flex-col overflow-hidden rounded-md border border-border bg-muted/40">
               <p className="shrink-0 border-b border-border px-3 py-2 text-[10px] tracking-wide text-muted-foreground uppercase">
@@ -2432,6 +2439,141 @@ function CookiesSectionInline({
   );
 }
 
+/**
+ * The profile's Local Storage with its cookies, as one Playwright
+ * `storageState` file: export it to an automation tool, or import one.
+ */
+function StorageStateBlock({
+  profile,
+  isDisabled,
+  t,
+}: {
+  profile: BrowserProfile;
+  isDisabled: boolean;
+  t: (key: string, options?: Record<string, unknown>) => string;
+}) {
+  const [stats, setStats] = React.useState<{
+    origins: number;
+    items: number;
+  } | null>(null);
+  const [busy, setBusy] = React.useState(false);
+
+  const loadStats = React.useCallback(async () => {
+    try {
+      setStats(
+        await invoke<{ origins: number; items: number }>(
+          "get_profile_local_storage_stats",
+          { profileId: profile.id },
+        ),
+      );
+    } catch {
+      setStats(null);
+    }
+  }, [profile.id]);
+
+  React.useEffect(() => {
+    void loadStats();
+  }, [loadStats]);
+
+  const handleExport = async () => {
+    setBusy(true);
+    try {
+      const content = await invoke<string>("export_profile_storage_state", {
+        profileId: profile.id,
+        includeCookies: true,
+      });
+      const filePath = await save({
+        defaultPath: `${profile.name}_storage_state.json`,
+        filters: [{ name: "JSON", extensions: ["json"] }],
+      });
+      if (!filePath) return;
+      await writeTextFile(filePath, content);
+      showSuccessToast(t("profileInfo.localStorage.exported"));
+    } catch (e) {
+      showErrorToast(translateBackendError(t as never, e));
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  const handleImport = async () => {
+    setBusy(true);
+    try {
+      const selected = await openDialog({
+        multiple: false,
+        filters: [{ name: "JSON", extensions: ["json"] }],
+      });
+      if (!selected || typeof selected !== "string") return;
+      const content = await readTextFile(selected);
+      const result = await invoke<{
+        origins: number;
+        items: number;
+        cookies_imported: number;
+      }>("import_profile_storage_state", { profileId: profile.id, content });
+      showSuccessToast(
+        t("profileInfo.localStorage.imported", {
+          items: result.items,
+          origins: result.origins,
+          cookies: result.cookies_imported,
+        }),
+      );
+      void loadStats();
+    } catch (e) {
+      showErrorToast(translateBackendError(t as never, e));
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  return (
+    <div
+      data-slot="profile-storage-state"
+      className="flex items-center justify-between gap-3 rounded-md border border-border bg-muted/40 px-3 py-2"
+    >
+      <div className="min-w-0">
+        <p className="text-[10px] tracking-wide text-muted-foreground uppercase">
+          {t("profileInfo.localStorage.title")}
+        </p>
+        <p className="mt-0.5 text-sm" data-slot="profile-local-storage-stats">
+          {stats
+            ? t("profileInfo.localStorage.stats", {
+                origins: stats.origins,
+                items: stats.items,
+              })
+            : "—"}
+        </p>
+        <p className="mt-0.5 text-xs text-muted-foreground">
+          {t("profileInfo.localStorage.hint")}
+        </p>
+      </div>
+      <div className="flex shrink-0 items-center gap-2">
+        <Button
+          variant="outline"
+          size="sm"
+          className="h-7 gap-1.5"
+          data-slot="storage-state-export"
+          disabled={isDisabled || busy}
+          onClick={() => void handleExport()}
+        >
+          <LuDownload className="size-3.5" />
+          {t("common.buttons.export")}
+        </Button>
+        <Button
+          variant="outline"
+          size="sm"
+          className="h-7 gap-1.5"
+          data-slot="storage-state-import"
+          disabled={isDisabled || busy}
+          onClick={() => void handleImport()}
+        >
+          <LuUpload className="size-3.5" />
+          {t("common.buttons.import")}
+        </Button>
+      </div>
+    </div>
+  );
+}
+
 // Inline password set / change / remove form. Replaces three separate
 // nested modal dialogs with one in-page form that branches on the current
 // `password_protected` state of the profile.
diff --git a/src/generated/licenses.json b/src/generated/licenses.json
index e0535671..ad4ef8e2 100644
--- a/src/generated/licenses.json
+++ b/src/generated/licenses.json
@@ -835,6 +835,10 @@
     "name": "crc-catalog",
     "license": "Apache-2.0 OR MIT"
   },
+  {
+    "name": "crc32c",
+    "license": "Apache-2.0 OR MIT"
+  },
   {
     "name": "crc32fast",
     "license": "Apache-2.0 OR MIT"
@@ -1247,6 +1251,10 @@
     "name": "framer-motion",
     "license": "MIT"
   },
+  {
+    "name": "fs2",
+    "license": "Apache-2.0 OR MIT"
+  },
   {
     "name": "futures",
     "license": "Apache-2.0 OR MIT"
@@ -1563,6 +1571,10 @@
     "name": "inout",
     "license": "Apache-2.0 OR MIT"
   },
+  {
+    "name": "integer-encoding",
+    "license": "MIT"
+  },
   {
     "name": "internmap",
     "license": "ISC"
@@ -2391,6 +2403,10 @@
     "name": "rustls-webpki",
     "license": "ISC"
   },
+  {
+    "name": "rusty-leveldb",
+    "license": "MIT"
+  },
   {
     "name": "ryu",
     "license": "Apache-2.0 OR BSL-1.0"
@@ -2591,6 +2607,10 @@
     "name": "smoltcp",
     "license": "0BSD"
   },
+  {
+    "name": "snap",
+    "license": "BSD-3-Clause"
+  },
   {
     "name": "socket2",
     "license": "Apache-2.0 OR MIT"
diff --git a/src/i18n/locales/de.json b/src/i18n/locales/de.json
index 95811c1c..3a075cde 100644
--- a/src/i18n/locales/de.json
+++ b/src/i18n/locales/de.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "Flüchtige Profile werden beim Schließen des Browsers verworfen, daher können ihnen keine Erweiterungsgruppen zugewiesen werden.",
       "syncUnavailable": "Flüchtige Profile werden beim Schließen des Browsers verworfen, daher gibt es nichts, was in die Cloud synchronisiert werden könnte.",
       "hint": "Erstellen Sie ein normales Profil, wenn die Daten erhalten bleiben sollen."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Websites: {{origins}} · Einträge: {{items}}",
+      "hint": "Eine Playwright-storageState-Datei mit den Cookies und dem Local Storage. Zum Importieren muss der Browser geschlossen sein.",
+      "exported": "Speicherzustand exportiert",
+      "imported": "Importiert. Local-Storage-Einträge: {{items}} · Websites: {{origins}} · Cookies: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "Sie können höchstens 100 Vorlagen behalten. Löschen Sie zuerst eine.",
     "bulkCreateCountInvalid": "Sie können 1 bis {{max}} Profile auf einmal erstellen.",
     "bulkCreateBusy": "Es werden bereits Profile erstellt. Warten Sie, bis das abgeschlossen ist.",
-    "mcpToolsetUnknown": "Diese Werkzeuggruppe existiert nicht."
+    "mcpToolsetUnknown": "Diese Werkzeuggruppe existiert nicht.",
+    "localStorageEphemeral": "Ein flüchtiges Profil speichert keinen Local Storage auf der Festplatte.",
+    "localStorageProfileProtected": "Dieses Profil ist passwortgeschützt. Sein Local Storage bleibt versiegelt.",
+    "localStorageUnreadable": "Der Local Storage des Profils konnte nicht gelesen werden.",
+    "localStorageUnwritable": "Der Local Storage des Profils konnte nicht geschrieben werden.",
+    "localStorageOriginInvalid": "„{{origin}}“ ist kein Web-Ursprung wie https://example.com.",
+    "localStorageOriginTooLarge": "Der Local Storage für {{origin}} ist größer als die 10 MiB, die eine Website behalten darf.",
+    "localStorageTooManyOrigins": "Die Datei enthält mehr als 10.000 Websites.",
+    "localStorageImportTooLarge": "Die Datei ist größer als 32 MiB.",
+    "storageStateInvalid": "Dies ist keine storageState-Datei.",
+    "localStorageBrowserRunning": "Schließen Sie den Browser, bevor Sie einen Speicherzustand importieren.",
+    "localStorageRemoteSession": "Eine Remote-Sitzung verwendet dieses Profil. Warten Sie, bis ihre Arbeit wieder hier ist."
   },
   "rail": {
     "profiles": "Profile",
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 744dfb46..de0e6932 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "Ephemeral profiles are discarded when the browser closes, so extension groups cannot be assigned to them.",
       "syncUnavailable": "Ephemeral profiles are discarded when the browser closes, so there is nothing to sync to the cloud.",
       "hint": "Create a regular profile if you need this to persist."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Sites: {{origins}} · Items: {{items}}",
+      "hint": "One Playwright storageState file with the cookies and the Local Storage. Import needs the browser closed.",
+      "exported": "Storage state exported",
+      "imported": "Imported. Local Storage items: {{items}} · Sites: {{origins}} · Cookies: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "You can keep at most 100 templates. Delete one first.",
     "bulkCreateCountInvalid": "You can create from 1 to {{max}} profiles at a time.",
     "bulkCreateBusy": "Profiles are already being created. Wait until that is done.",
-    "mcpToolsetUnknown": "This tool group does not exist."
+    "mcpToolsetUnknown": "This tool group does not exist.",
+    "localStorageEphemeral": "An ephemeral profile keeps no Local Storage on disk.",
+    "localStorageProfileProtected": "This profile is password-protected. Its Local Storage stays sealed.",
+    "localStorageUnreadable": "The profile's Local Storage could not be read.",
+    "localStorageUnwritable": "The profile's Local Storage could not be written.",
+    "localStorageOriginInvalid": "\"{{origin}}\" is not a web origin like https://example.com.",
+    "localStorageOriginTooLarge": "Local Storage for {{origin}} is larger than the 10 MiB a site may keep.",
+    "localStorageTooManyOrigins": "The file has more than 10,000 sites.",
+    "localStorageImportTooLarge": "The file is larger than 32 MiB.",
+    "storageStateInvalid": "This is not a storageState file.",
+    "localStorageBrowserRunning": "Close the browser before you import a storage state.",
+    "localStorageRemoteSession": "A remote session owns this profile. Wait until its work is back here."
   },
   "rail": {
     "profiles": "Profiles",
diff --git a/src/i18n/locales/es.json b/src/i18n/locales/es.json
index d963a5b9..c8942a8e 100644
--- a/src/i18n/locales/es.json
+++ b/src/i18n/locales/es.json
@@ -1621,6 +1621,13 @@
       "extensionsUnavailable": "Los perfiles efímeros se descartan al cerrar el navegador, así que no se les pueden asignar grupos de extensiones.",
       "syncUnavailable": "Los perfiles efímeros se descartan al cerrar el navegador, así que no hay nada que sincronizar con la nube.",
       "hint": "Crea un perfil normal si necesitas que esto se conserve."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Sitios: {{origins}} · Elementos: {{items}}",
+      "hint": "Un archivo storageState de Playwright con las cookies y el Local Storage. Para importar, el navegador debe estar cerrado.",
+      "exported": "Estado de almacenamiento exportado",
+      "imported": "Importado. Elementos de Local Storage: {{items}} · Sitios: {{origins}} · Cookies: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2640,7 +2647,18 @@
     "templateLimitReached": "Puedes guardar como máximo 100 plantillas. Elimina una primero.",
     "bulkCreateCountInvalid": "Puedes crear de 1 a {{max}} perfiles a la vez.",
     "bulkCreateBusy": "Ya se están creando perfiles. Espera a que termine.",
-    "mcpToolsetUnknown": "Este grupo de herramientas no existe."
+    "mcpToolsetUnknown": "Este grupo de herramientas no existe.",
+    "localStorageEphemeral": "Un perfil efímero no guarda Local Storage en el disco.",
+    "localStorageProfileProtected": "Este perfil está protegido con contraseña. Su Local Storage sigue sellado.",
+    "localStorageUnreadable": "No se pudo leer el Local Storage del perfil.",
+    "localStorageUnwritable": "No se pudo escribir el Local Storage del perfil.",
+    "localStorageOriginInvalid": "\"{{origin}}\" no es un origen web como https://example.com.",
+    "localStorageOriginTooLarge": "El Local Storage de {{origin}} supera los 10 MiB que puede guardar un sitio.",
+    "localStorageTooManyOrigins": "El archivo tiene más de 10.000 sitios.",
+    "localStorageImportTooLarge": "El archivo supera los 32 MiB.",
+    "storageStateInvalid": "Este no es un archivo storageState.",
+    "localStorageBrowserRunning": "Cierra el navegador antes de importar un estado de almacenamiento.",
+    "localStorageRemoteSession": "Una sesión remota usa este perfil. Espera a que su trabajo vuelva aquí."
   },
   "rail": {
     "profiles": "Perfiles",
diff --git a/src/i18n/locales/fr.json b/src/i18n/locales/fr.json
index 9fb50c53..150fc962 100644
--- a/src/i18n/locales/fr.json
+++ b/src/i18n/locales/fr.json
@@ -1621,6 +1621,13 @@
       "extensionsUnavailable": "Les profils éphémères sont supprimés à la fermeture du navigateur : aucun groupe d'extensions ne peut leur être attribué.",
       "syncUnavailable": "Les profils éphémères sont supprimés à la fermeture du navigateur : il n'y a rien à synchroniser vers le cloud.",
       "hint": "Créez un profil normal si vous avez besoin de conserver ces données."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Sites : {{origins}} · Éléments : {{items}}",
+      "hint": "Un fichier storageState de Playwright avec les cookies et le Local Storage. L'import nécessite que le navigateur soit fermé.",
+      "exported": "État de stockage exporté",
+      "imported": "Importé. Éléments Local Storage : {{items}} · Sites : {{origins}} · Cookies : {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2640,7 +2647,18 @@
     "templateLimitReached": "Vous pouvez garder au plus 100 modèles. Supprimez-en un d'abord.",
     "bulkCreateCountInvalid": "Vous pouvez créer de 1 à {{max}} profils à la fois.",
     "bulkCreateBusy": "Des profils sont déjà en cours de création. Attendez la fin.",
-    "mcpToolsetUnknown": "Ce groupe d'outils n'existe pas."
+    "mcpToolsetUnknown": "Ce groupe d'outils n'existe pas.",
+    "localStorageEphemeral": "Un profil éphémère ne garde pas de Local Storage sur le disque.",
+    "localStorageProfileProtected": "Ce profil est protégé par un mot de passe. Son Local Storage reste scellé.",
+    "localStorageUnreadable": "Impossible de lire le Local Storage du profil.",
+    "localStorageUnwritable": "Impossible d'écrire le Local Storage du profil.",
+    "localStorageOriginInvalid": "« {{origin}} » n'est pas une origine web comme https://example.com.",
+    "localStorageOriginTooLarge": "Le Local Storage de {{origin}} dépasse les 10 Mio qu'un site peut garder.",
+    "localStorageTooManyOrigins": "Le fichier contient plus de 10 000 sites.",
+    "localStorageImportTooLarge": "Le fichier dépasse 32 Mio.",
+    "storageStateInvalid": "Ce n'est pas un fichier storageState.",
+    "localStorageBrowserRunning": "Fermez le navigateur avant d'importer un état de stockage.",
+    "localStorageRemoteSession": "Une session distante utilise ce profil. Attendez que son travail soit revenu ici."
   },
   "rail": {
     "profiles": "Profils",
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index d3e23905..f24088fb 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "一時プロファイルはブラウザーを閉じると破棄されるため、拡張機能グループを割り当てられません。",
       "syncUnavailable": "一時プロファイルはブラウザーを閉じると破棄されるため、クラウドに同期するものはありません。",
       "hint": "データを保持したい場合は通常のプロファイルを作成してください。"
+    },
+    "localStorage": {
+      "title": "ローカルストレージ",
+      "stats": "サイト: {{origins}} · 項目: {{items}}",
+      "hint": "Cookie とローカルストレージを 1 つの Playwright storageState ファイルにまとめます。インポートするにはブラウザーを閉じてください。",
+      "exported": "ストレージ状態をエクスポートしました",
+      "imported": "インポートしました。ローカルストレージの項目: {{items}} · サイト: {{origins}} · Cookie: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "保存できるテンプレートは最大100件です。先に1件削除してください。",
     "bulkCreateCountInvalid": "一度に作成できるプロファイルは1〜{{max}}件です。",
     "bulkCreateBusy": "既にプロファイルを作成中です。完了するまでお待ちください。",
-    "mcpToolsetUnknown": "このツールグループは存在しません。"
+    "mcpToolsetUnknown": "このツールグループは存在しません。",
+    "localStorageEphemeral": "エフェメラルプロファイルはローカルストレージをディスクに保存しません。",
+    "localStorageProfileProtected": "このプロファイルはパスワードで保護されています。ローカルストレージは封印されたままです。",
+    "localStorageUnreadable": "プロファイルのローカルストレージを読み取れませんでした。",
+    "localStorageUnwritable": "プロファイルのローカルストレージに書き込めませんでした。",
+    "localStorageOriginInvalid": "「{{origin}}」は https://example.com のような Web オリジンではありません。",
+    "localStorageOriginTooLarge": "{{origin}} のローカルストレージが、サイトが保存できる 10 MiB を超えています。",
+    "localStorageTooManyOrigins": "ファイルに 10,000 を超えるサイトが含まれています。",
+    "localStorageImportTooLarge": "ファイルが 32 MiB を超えています。",
+    "storageStateInvalid": "これは storageState ファイルではありません。",
+    "localStorageBrowserRunning": "ストレージ状態をインポートする前にブラウザーを閉じてください。",
+    "localStorageRemoteSession": "リモートセッションがこのプロファイルを使用しています。作業がここに戻るまでお待ちください。"
   },
   "rail": {
     "profiles": "プロファイル",
diff --git a/src/i18n/locales/ko.json b/src/i18n/locales/ko.json
index da7302e6..f9920c90 100644
--- a/src/i18n/locales/ko.json
+++ b/src/i18n/locales/ko.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "임시 프로필은 브라우저를 닫으면 삭제되므로 확장 프로그램 그룹을 지정할 수 없습니다.",
       "syncUnavailable": "임시 프로필은 브라우저를 닫으면 삭제되므로 클라우드에 동기화할 항목이 없습니다.",
       "hint": "데이터를 유지하려면 일반 프로필을 만드세요."
+    },
+    "localStorage": {
+      "title": "로컬 스토리지",
+      "stats": "사이트: {{origins}} · 항목: {{items}}",
+      "hint": "쿠키와 로컬 스토리지를 하나의 Playwright storageState 파일로 담습니다. 가져오려면 브라우저를 닫아야 합니다.",
+      "exported": "스토리지 상태를 내보냈습니다",
+      "imported": "가져왔습니다. 로컬 스토리지 항목: {{items}} · 사이트: {{origins}} · 쿠키: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "템플릿은 최대 100개까지 보관할 수 있습니다. 먼저 하나를 삭제하세요.",
     "bulkCreateCountInvalid": "한 번에 1개부터 {{max}}개까지 프로필을 만들 수 있습니다.",
     "bulkCreateBusy": "이미 프로필을 만드는 중입니다. 끝날 때까지 기다리세요.",
-    "mcpToolsetUnknown": "이 도구 그룹은 없습니다."
+    "mcpToolsetUnknown": "이 도구 그룹은 없습니다.",
+    "localStorageEphemeral": "임시 프로필은 로컬 스토리지를 디스크에 저장하지 않습니다.",
+    "localStorageProfileProtected": "이 프로필은 비밀번호로 보호되어 있습니다. 로컬 스토리지는 봉인된 상태로 유지됩니다.",
+    "localStorageUnreadable": "프로필의 로컬 스토리지를 읽지 못했습니다.",
+    "localStorageUnwritable": "프로필의 로컬 스토리지에 쓰지 못했습니다.",
+    "localStorageOriginInvalid": "\"{{origin}}\"은(는) https://example.com 같은 웹 출처가 아닙니다.",
+    "localStorageOriginTooLarge": "{{origin}}의 로컬 스토리지가 사이트가 보관할 수 있는 10 MiB를 넘습니다.",
+    "localStorageTooManyOrigins": "파일에 사이트가 10,000개 넘게 있습니다.",
+    "localStorageImportTooLarge": "파일이 32 MiB보다 큽니다.",
+    "storageStateInvalid": "storageState 파일이 아닙니다.",
+    "localStorageBrowserRunning": "스토리지 상태를 가져오기 전에 브라우저를 닫으세요.",
+    "localStorageRemoteSession": "원격 세션이 이 프로필을 사용 중입니다. 작업이 이곳으로 돌아올 때까지 기다리세요."
   },
   "rail": {
     "profiles": "프로필",
diff --git a/src/i18n/locales/pt.json b/src/i18n/locales/pt.json
index e61e7ee7..13c181b2 100644
--- a/src/i18n/locales/pt.json
+++ b/src/i18n/locales/pt.json
@@ -1621,6 +1621,13 @@
       "extensionsUnavailable": "Perfis efêmeros são descartados quando o navegador fecha, portanto não é possível atribuir grupos de extensões a eles.",
       "syncUnavailable": "Perfis efêmeros são descartados quando o navegador fecha, portanto não há nada para sincronizar com a nuvem.",
       "hint": "Crie um perfil normal se precisar que isso seja mantido."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Sites: {{origins}} · Itens: {{items}}",
+      "hint": "Um arquivo storageState do Playwright com os cookies e o Local Storage. Para importar, o navegador precisa estar fechado.",
+      "exported": "Estado de armazenamento exportado",
+      "imported": "Importado. Itens de Local Storage: {{items}} · Sites: {{origins}} · Cookies: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2640,7 +2647,18 @@
     "templateLimitReached": "Você pode manter no máximo 100 modelos. Exclua um primeiro.",
     "bulkCreateCountInvalid": "Você pode criar de 1 a {{max}} perfis de cada vez.",
     "bulkCreateBusy": "Já há perfis sendo criados. Aguarde até terminar.",
-    "mcpToolsetUnknown": "Este grupo de ferramentas não existe."
+    "mcpToolsetUnknown": "Este grupo de ferramentas não existe.",
+    "localStorageEphemeral": "Um perfil efêmero não guarda Local Storage no disco.",
+    "localStorageProfileProtected": "Este perfil é protegido por senha. O Local Storage dele continua selado.",
+    "localStorageUnreadable": "Não foi possível ler o Local Storage do perfil.",
+    "localStorageUnwritable": "Não foi possível gravar o Local Storage do perfil.",
+    "localStorageOriginInvalid": "\"{{origin}}\" não é uma origem web como https://example.com.",
+    "localStorageOriginTooLarge": "O Local Storage de {{origin}} passa dos 10 MiB que um site pode guardar.",
+    "localStorageTooManyOrigins": "O arquivo tem mais de 10.000 sites.",
+    "localStorageImportTooLarge": "O arquivo tem mais de 32 MiB.",
+    "storageStateInvalid": "Este não é um arquivo storageState.",
+    "localStorageBrowserRunning": "Feche o navegador antes de importar um estado de armazenamento.",
+    "localStorageRemoteSession": "Uma sessão remota está usando este perfil. Aguarde até o trabalho dela voltar para cá."
   },
   "rail": {
     "profiles": "Perfis",
diff --git a/src/i18n/locales/ru.json b/src/i18n/locales/ru.json
index 7402cdfe..f78196f4 100644
--- a/src/i18n/locales/ru.json
+++ b/src/i18n/locales/ru.json
@@ -1632,6 +1632,13 @@
       "extensionsUnavailable": "Временные профили удаляются при закрытии браузера, поэтому назначить им группы расширений нельзя.",
       "syncUnavailable": "Временные профили удаляются при закрытии браузера, поэтому синхронизировать с облаком нечего.",
       "hint": "Создайте обычный профиль, если эти данные должны сохраняться."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Сайты: {{origins}} · Записи: {{items}}",
+      "hint": "Один файл storageState для Playwright с cookie и Local Storage. Для импорта браузер должен быть закрыт.",
+      "exported": "Состояние хранилища экспортировано",
+      "imported": "Импортировано. Записи Local Storage: {{items}} · Сайты: {{origins}} · Cookie: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2660,7 +2667,18 @@
     "templateLimitReached": "Можно хранить не более 100 шаблонов. Сначала удалите один.",
     "bulkCreateCountInvalid": "За один раз можно создать от 1 до {{max}} профилей.",
     "bulkCreateBusy": "Профили уже создаются. Дождитесь окончания.",
-    "mcpToolsetUnknown": "Такой группы инструментов нет."
+    "mcpToolsetUnknown": "Такой группы инструментов нет.",
+    "localStorageEphemeral": "Временный профиль не хранит Local Storage на диске.",
+    "localStorageProfileProtected": "Профиль защищён паролем. Его Local Storage остаётся запечатанным.",
+    "localStorageUnreadable": "Не удалось прочитать Local Storage профиля.",
+    "localStorageUnwritable": "Не удалось записать Local Storage профиля.",
+    "localStorageOriginInvalid": "«{{origin}}» — не веб-источник вида https://example.com.",
+    "localStorageOriginTooLarge": "Local Storage для {{origin}} больше 10 МиБ, которые может хранить сайт.",
+    "localStorageTooManyOrigins": "В файле больше 10 000 сайтов.",
+    "localStorageImportTooLarge": "Файл больше 32 МиБ.",
+    "storageStateInvalid": "Это не файл storageState.",
+    "localStorageBrowserRunning": "Закройте браузер перед импортом состояния хранилища.",
+    "localStorageRemoteSession": "Этот профиль использует удалённая сессия. Дождитесь, пока её работа вернётся сюда."
   },
   "rail": {
     "profiles": "Профили",
diff --git a/src/i18n/locales/tr.json b/src/i18n/locales/tr.json
index 23156134..48330f36 100644
--- a/src/i18n/locales/tr.json
+++ b/src/i18n/locales/tr.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "Geçici profiller tarayıcı kapandığında silinir, bu yüzden onlara uzantı grubu atanamaz.",
       "syncUnavailable": "Geçici profiller tarayıcı kapandığında silinir, bu yüzden buluta eşitlenecek bir şey yoktur.",
       "hint": "Bunun kalıcı olmasını istiyorsanız normal bir profil oluşturun."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Siteler: {{origins}} · Öğeler: {{items}}",
+      "hint": "Çerezleri ve Local Storage'ı tek bir Playwright storageState dosyasında toplar. İçe aktarmak için tarayıcı kapalı olmalıdır.",
+      "exported": "Depolama durumu dışa aktarıldı",
+      "imported": "İçe aktarıldı. Local Storage öğeleri: {{items}} · Siteler: {{origins}} · Çerezler: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "En fazla 100 şablon tutabilirsiniz. Önce birini silin.",
     "bulkCreateCountInvalid": "Bir seferde 1 ile {{max}} arasında profil oluşturabilirsiniz.",
     "bulkCreateBusy": "Profiller zaten oluşturuluyor. Bitmesini bekleyin.",
-    "mcpToolsetUnknown": "Bu araç grubu yok."
+    "mcpToolsetUnknown": "Bu araç grubu yok.",
+    "localStorageEphemeral": "Geçici bir profil Local Storage'ı diskte tutmaz.",
+    "localStorageProfileProtected": "Bu profil parolayla korunuyor. Local Storage'ı mühürlü kalır.",
+    "localStorageUnreadable": "Profilin Local Storage'ı okunamadı.",
+    "localStorageUnwritable": "Profilin Local Storage'ına yazılamadı.",
+    "localStorageOriginInvalid": "\"{{origin}}\", https://example.com gibi bir web kaynağı değil.",
+    "localStorageOriginTooLarge": "{{origin}} için Local Storage, bir sitenin tutabileceği 10 MiB'tan büyük.",
+    "localStorageTooManyOrigins": "Dosyada 10.000'den fazla site var.",
+    "localStorageImportTooLarge": "Dosya 32 MiB'tan büyük.",
+    "storageStateInvalid": "Bu bir storageState dosyası değil.",
+    "localStorageBrowserRunning": "Bir depolama durumunu içe aktarmadan önce tarayıcıyı kapatın.",
+    "localStorageRemoteSession": "Bu profili uzak bir oturum kullanıyor. İşi buraya dönene kadar bekleyin."
   },
   "rail": {
     "profiles": "Profiller",
diff --git a/src/i18n/locales/vi.json b/src/i18n/locales/vi.json
index b0c8b035..c140b73f 100644
--- a/src/i18n/locales/vi.json
+++ b/src/i18n/locales/vi.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "Hồ sơ tạm thời bị xoá khi đóng trình duyệt, nên không thể gán nhóm tiện ích mở rộng cho chúng.",
       "syncUnavailable": "Hồ sơ tạm thời bị xoá khi đóng trình duyệt, nên không có gì để đồng bộ lên đám mây.",
       "hint": "Hãy tạo hồ sơ thường nếu bạn cần giữ lại dữ liệu này."
+    },
+    "localStorage": {
+      "title": "Local Storage",
+      "stats": "Trang web: {{origins}} · Mục: {{items}}",
+      "hint": "Một tệp storageState của Playwright gồm cookie và Local Storage. Để nhập, trình duyệt phải đóng.",
+      "exported": "Đã xuất trạng thái lưu trữ",
+      "imported": "Đã nhập. Mục Local Storage: {{items}} · Trang web: {{origins}} · Cookie: {{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "Bạn chỉ có thể giữ tối đa 100 mẫu. Hãy xóa một mẫu trước.",
     "bulkCreateCountInvalid": "Mỗi lần bạn có thể tạo từ 1 đến {{max}} profile.",
     "bulkCreateBusy": "Đang có profile được tạo. Hãy chờ đến khi xong.",
-    "mcpToolsetUnknown": "Nhóm công cụ này không tồn tại."
+    "mcpToolsetUnknown": "Nhóm công cụ này không tồn tại.",
+    "localStorageEphemeral": "Profile tạm thời không lưu Local Storage trên đĩa.",
+    "localStorageProfileProtected": "Profile này được bảo vệ bằng mật khẩu. Local Storage của nó vẫn được niêm phong.",
+    "localStorageUnreadable": "Không thể đọc Local Storage của profile.",
+    "localStorageUnwritable": "Không thể ghi Local Storage của profile.",
+    "localStorageOriginInvalid": "\"{{origin}}\" không phải nguồn web như https://example.com.",
+    "localStorageOriginTooLarge": "Local Storage của {{origin}} lớn hơn 10 MiB mà một trang web được giữ.",
+    "localStorageTooManyOrigins": "Tệp có hơn 10.000 trang web.",
+    "localStorageImportTooLarge": "Tệp lớn hơn 32 MiB.",
+    "storageStateInvalid": "Đây không phải tệp storageState.",
+    "localStorageBrowserRunning": "Hãy đóng trình duyệt trước khi nhập trạng thái lưu trữ.",
+    "localStorageRemoteSession": "Một phiên từ xa đang dùng profile này. Hãy đợi đến khi công việc của nó trở lại đây."
   },
   "rail": {
     "profiles": "Profile",
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index 05be1463..054c0af8 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -1610,6 +1610,13 @@
       "extensionsUnavailable": "临时配置在浏览器关闭时会被丢弃，因此无法为其分配扩展分组。",
       "syncUnavailable": "临时配置在浏览器关闭时会被丢弃，因此没有可同步到云端的内容。",
       "hint": "如果需要保留这些数据，请创建普通配置。"
+    },
+    "localStorage": {
+      "title": "本地存储",
+      "stats": "网站：{{origins}} · 条目：{{items}}",
+      "hint": "一个包含 Cookie 和本地存储的 Playwright storageState 文件。导入时浏览器必须关闭。",
+      "exported": "已导出存储状态",
+      "imported": "已导入。本地存储条目：{{items}} · 网站：{{origins}} · Cookie：{{cookies}}"
     }
   },
   "profileTransfer": {
@@ -2620,7 +2627,18 @@
     "templateLimitReached": "最多可保留 100 个模板。请先删除一个。",
     "bulkCreateCountInvalid": "每次可以创建 1 到 {{max}} 个配置文件。",
     "bulkCreateBusy": "已在创建配置文件。请等待完成。",
-    "mcpToolsetUnknown": "该工具分组不存在。"
+    "mcpToolsetUnknown": "该工具分组不存在。",
+    "localStorageEphemeral": "临时配置文件不会在磁盘上保存本地存储。",
+    "localStorageProfileProtected": "此配置文件受密码保护，其本地存储保持封存。",
+    "localStorageUnreadable": "无法读取配置文件的本地存储。",
+    "localStorageUnwritable": "无法写入配置文件的本地存储。",
+    "localStorageOriginInvalid": "“{{origin}}”不是 https://example.com 这样的网页来源。",
+    "localStorageOriginTooLarge": "{{origin}} 的本地存储超过了网站可保留的 10 MiB。",
+    "localStorageTooManyOrigins": "文件中的网站超过 10,000 个。",
+    "localStorageImportTooLarge": "文件大于 32 MiB。",
+    "storageStateInvalid": "这不是 storageState 文件。",
+    "localStorageBrowserRunning": "导入存储状态前请关闭浏览器。",
+    "localStorageRemoteSession": "远程会话正在使用此配置文件。请等待其工作回到这里。"
   },
   "rail": {
     "profiles": "配置文件",
diff --git a/src/lib/backend-errors.ts b/src/lib/backend-errors.ts
index 11c34600..41556d99 100644
--- a/src/lib/backend-errors.ts
+++ b/src/lib/backend-errors.ts
@@ -122,6 +122,17 @@ export type BackendErrorCode =
   | "API_PORT_UNAVAILABLE"
   | "MCP_AGENT_UNKNOWN"
   | "MCP_TOOLSET_UNKNOWN"
+  | "LOCAL_STORAGE_EPHEMERAL"
+  | "LOCAL_STORAGE_PROFILE_PROTECTED"
+  | "LOCAL_STORAGE_UNREADABLE"
+  | "LOCAL_STORAGE_UNWRITABLE"
+  | "LOCAL_STORAGE_ORIGIN_INVALID"
+  | "LOCAL_STORAGE_ORIGIN_TOO_LARGE"
+  | "LOCAL_STORAGE_TOO_MANY_ORIGINS"
+  | "LOCAL_STORAGE_IMPORT_TOO_LARGE"
+  | "STORAGE_STATE_INVALID"
+  | "LOCAL_STORAGE_BROWSER_RUNNING"
+  | "LOCAL_STORAGE_REMOTE_SESSION"
   | "MCP_AGENT_INSTALL_FAILED"
   | "MCP_AGENT_REMOVE_FAILED"
   | "MCP_REMOTE_REQUIRES_SIGN_IN"
@@ -636,6 +647,32 @@ export function translateBackendError(t: TFunction, err: unknown): string {
       return t("backendErrors.mcpRemoteKeyLimit");
     case "MCP_REMOTE_KEY_UNAVAILABLE":
       return t("backendErrors.mcpRemoteKeyUnavailable");
+    case "LOCAL_STORAGE_EPHEMERAL":
+      return t("backendErrors.localStorageEphemeral");
+    case "LOCAL_STORAGE_PROFILE_PROTECTED":
+      return t("backendErrors.localStorageProfileProtected");
+    case "LOCAL_STORAGE_UNREADABLE":
+      return t("backendErrors.localStorageUnreadable");
+    case "LOCAL_STORAGE_UNWRITABLE":
+      return t("backendErrors.localStorageUnwritable");
+    case "LOCAL_STORAGE_ORIGIN_INVALID":
+      return t("backendErrors.localStorageOriginInvalid", {
+        origin: parsed.params?.origin ?? "",
+      });
+    case "LOCAL_STORAGE_ORIGIN_TOO_LARGE":
+      return t("backendErrors.localStorageOriginTooLarge", {
+        origin: parsed.params?.origin ?? "",
+      });
+    case "LOCAL_STORAGE_TOO_MANY_ORIGINS":
+      return t("backendErrors.localStorageTooManyOrigins");
+    case "LOCAL_STORAGE_IMPORT_TOO_LARGE":
+      return t("backendErrors.localStorageImportTooLarge");
+    case "STORAGE_STATE_INVALID":
+      return t("backendErrors.storageStateInvalid");
+    case "LOCAL_STORAGE_BROWSER_RUNNING":
+      return t("backendErrors.localStorageBrowserRunning");
+    case "LOCAL_STORAGE_REMOTE_SESSION":
+      return t("backendErrors.localStorageRemoteSession");
     case "MCP_TOOLSET_UNKNOWN":
       return t("backendErrors.mcpToolsetUnknown");
     case "MCP_AGENT_UNKNOWN":