feat: set default search engine on camoufox

src-tauri/Cargo.lock

@@ -1616,6 +1616,7 @@ dependencies = [
  "lazy_static",
  "libc",
  "log",
+ "lz4_flex",
  "lzma-rs",
  "maxminddb",
  "mime_guess",
@@ -3452,6 +3453,15 @@ dependencies = [
  "imgref",
 ]
 
+[[package]]
+name = "lz4_flex"
+version = "0.11.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08ab2867e3eeeca90e844d1940eab391c9dc5228783db2ed999acbc0a9ed375a"
+dependencies = [
+ "twox-hash",
+]
+
 [[package]]
 name = "lzma-rs"
 version = "0.3.0"
@@ -7160,6 +7170,12 @@ dependencies = [
  "utf-8",
 ]
 
+[[package]]
+name = "twox-hash"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ea3136b675547379c4bd395ca6b938e5ad3c3d20fad76e7fe85f9e0d011419c"
+
 [[package]]
 name = "typed-path"
 version = "0.12.3"

src-tauri/Cargo.toml

@@ -100,6 +100,7 @@ maxminddb = "0.27"
 quick-xml = { version = "0.39", features = ["serialize"] }
 
 # VPN support
+lz4_flex = "0.11"
 boringtun = "0.7"
 smoltcp = { version = "0.11", default-features = false, features = ["std", "medium-ip", "proto-ipv4", "proto-ipv6", "socket-tcp", "socket-udp"] }
 

src-tauri/src/browser_runner.rs

@@ -223,14 +223,6 @@ impl BrowserRunner {
         );
       }
 
-      // Ensure DuckDuckGo is set as default search engine for Camoufox
-      let mut browser_dir = self.get_binaries_dir();
-      browser_dir.push(&profile.browser);
-      browser_dir.push(&profile.version);
-      if let Err(e) = crate::downloader::configure_camoufox_search_engine(&browser_dir) {
-        log::warn!("Failed to configure Camoufox search engine: {e}");
-      }
-
       // Create ephemeral dir for ephemeral profiles
       let override_profile_path = if profile.ephemeral {
         let dir = crate::ephemeral_dirs::create_ephemeral_dir(&profile.id.to_string())

src-tauri/src/camoufox_manager.rs

@@ -628,40 +628,8 @@ impl CamoufoxManager {
       }
     }
 
-    // Write DuckDuckGo search engine prefs to user.js for all profiles
+    // Write search.json.mozlz4 with default search engines (DuckDuckGo + Google)
-    {
+    write_default_search_config(&profile_path);
-      let user_js_path = profile_path.join("user.js");
-      let ddg_prefs = concat!(
-        "user_pref(\"browser.search.defaultenginename\", \"DuckDuckGo\");\n",
-        "user_pref(\"browser.search.order.1\", \"DuckDuckGo\");\n",
-        "user_pref(\"browser.urlbar.placeholderName\", \"DuckDuckGo\");\n",
-        "user_pref(\"browser.urlbar.placeholderName.private\", \"DuckDuckGo\");\n",
-      );
-
-      let needs_write = if user_js_path.exists() {
-        std::fs::read_to_string(&user_js_path)
-          .map(|existing| !existing.contains("browser.search.defaultenginename"))
-          .unwrap_or(false)
-      } else {
-        true
-      };
-
-      if needs_write {
-        use std::fs::OpenOptions;
-        match OpenOptions::new()
-          .create(true)
-          .append(true)
-          .open(&user_js_path)
-        {
-          Ok(mut f) => {
-            if let Err(e) = std::io::Write::write_all(&mut f, ddg_prefs.as_bytes()) {
-              log::warn!("Failed to write DuckDuckGo prefs to user.js: {e}");
-            }
-          }
-          Err(e) => log::warn!("Failed to open user.js for DuckDuckGo prefs: {e}"),
-        }
-      }
-    }
 
     self
       .launch_camoufox(
@@ -676,6 +644,77 @@ impl CamoufoxManager {
   }
 }
 
+fn write_default_search_config(profile_path: &std::path::Path) {
+  let search_file = profile_path.join("search.json.mozlz4");
+  if search_file.exists() {
+    return;
+  }
+
+  let json = serde_json::json!({
+    "version": 6,
+    "engines": [
+      {
+        "_name": "DuckDuckGo",
+        "_isAppProvided": false,
+        "_metaData": { "order": 1 },
+        "_urls": [
+          {
+            "template": "https://duckduckgo.com/?q={searchTerms}",
+            "type": "text/html",
+            "params": []
+          },
+          {
+            "template": "https://duckduckgo.com/ac/?q={searchTerms}&type=list",
+            "type": "application/x-suggestions+json",
+            "params": []
+          }
+        ],
+        "_iconURL": "https://duckduckgo.com/favicon.ico"
+      },
+      {
+        "_name": "Google",
+        "_isAppProvided": false,
+        "_metaData": { "order": 2 },
+        "_urls": [
+          {
+            "template": "https://www.google.com/search?q={searchTerms}",
+            "type": "text/html",
+            "params": []
+          },
+          {
+            "template": "https://www.google.com/complete/search?client=firefox&q={searchTerms}",
+            "type": "application/x-suggestions+json",
+            "params": []
+          }
+        ],
+        "_iconURL": "https://www.google.com/favicon.ico"
+      }
+    ],
+    "metaData": {
+      "useSavedOrder": false,
+      "defaultEngineId": "DuckDuckGo"
+    }
+  });
+
+  let json_bytes = match serde_json::to_vec(&json) {
+    Ok(bytes) => bytes,
+    Err(e) => {
+      log::warn!("Failed to serialize search config: {e}");
+      return;
+    }
+  };
+
+  let magic = b"mozLz40\0";
+  let compressed = lz4_flex::block::compress_prepend_size(&json_bytes);
+  let mut output = Vec::with_capacity(magic.len() + compressed.len());
+  output.extend_from_slice(magic);
+  output.extend_from_slice(&compressed);
+
+  if let Err(e) = std::fs::write(&search_file, &output) {
+    log::warn!("Failed to write search.json.mozlz4: {e}");
+  }
+}
+
 #[cfg(test)]
 mod tests {
   use super::*;