feat: dns block lists

src-tauri/src/api_server.rs

@@ -611,6 +611,7 @@ async fn create_profile(
       wayfern_config,
       request.group_id.clone(),
       false,
+      None,
     )
     .await
   {

src-tauri/src/app_dirs.rs

@@ -104,6 +104,10 @@ pub fn extensions_dir() -> PathBuf {
   data_dir().join("extensions")
 }
 
+pub fn dns_blocklist_dir() -> PathBuf {
+  cache_dir().join("dns_blocklists")
+}
+
 #[cfg(test)]
 thread_local! {
   static TEST_DATA_DIR: std::cell::RefCell<Option<PathBuf>> = const { std::cell::RefCell::new(None) };
@@ -188,6 +192,7 @@ mod tests {
     assert!(proxy_workers_dir().ends_with("proxy_workers"));
     assert!(vpn_dir().ends_with("vpn"));
     assert!(extensions_dir().ends_with("extensions"));
+    assert!(dns_blocklist_dir().ends_with("dns_blocklists"));
   }
 
   #[test]

src-tauri/src/auto_updater.rs

@@ -699,6 +699,7 @@ mod tests {
       proxy_bypass_rules: Vec::new(),
       created_by_id: None,
       created_by_email: None,
+      dns_blocklist: None,
     }
   }
 

src-tauri/src/bin/proxy_server.rs

@@ -152,6 +152,11 @@ async fn main() {
               Arg::new("bypass-rules")
                 .long("bypass-rules")
                 .help("JSON array of bypass rules (hostnames, IPs, or regex patterns)"),
+            )
+            .arg(
+              Arg::new("blocklist-file")
+                .long("blocklist-file")
+                .help("Path to DNS blocklist file (one domain per line)"),
             ),
         )
         .subcommand(
@@ -235,8 +240,17 @@ async fn main() {
         .get_one::<String>("bypass-rules")
         .and_then(|s| serde_json::from_str(s).ok())
         .unwrap_or_default();
+      let blocklist_file = start_matches.get_one::<String>("blocklist-file").cloned();
 
-      match start_proxy_process_with_profile(upstream_url, port, profile_id, bypass_rules).await {
+      match start_proxy_process_with_profile(
+        upstream_url,
+        port,
+        profile_id,
+        bypass_rules,
+        blocklist_file,
+      )
+      .await
+      {
         Ok(config) => {
           // Output the configuration as JSON for the Rust side to parse
           // Use println! here because this needs to go to stdout for parsing

src-tauri/src/browser.rs

@@ -1216,6 +1216,7 @@ mod tests {
       proxy_bypass_rules: Vec::new(),
       created_by_id: None,
       created_by_email: None,
+      dns_blocklist: None,
     };
 
     let path = profile.get_profile_data_path(&profiles_dir);

src-tauri/src/browser_runner.rs

@@ -38,6 +38,26 @@ impl BrowserRunner {
     crate::app_dirs::binaries_dir()
   }
 
+  /// Resolve the DNS blocklist level to a cached file path.
+  /// If a level is set but the cache is missing, fetches on demand (blocks until done).
+  async fn resolve_blocklist_file(
+    profile: &crate::profile::BrowserProfile,
+  ) -> Result<Option<String>, String> {
+    let Some(ref level_str) = profile.dns_blocklist else {
+      return Ok(None);
+    };
+    let Some(level) = crate::dns_blocklist::BlocklistLevel::parse_level(level_str) else {
+      return Ok(None);
+    };
+    if level == crate::dns_blocklist::BlocklistLevel::None {
+      return Ok(None);
+    }
+    let path = crate::dns_blocklist::BlocklistManager::ensure_cached(level)
+      .await
+      .map_err(|e| format!("Failed to fetch DNS blocklist: {e}"))?;
+    Ok(Some(path.to_string_lossy().to_string()))
+  }
+
   /// Refresh cloud proxy credentials if the profile uses a cloud or cloud-derived proxy,
   /// then resolve the proxy settings with profile-specific sid for sticky sessions.
   /// Resolve proxy settings for a profile, returning an error for dynamic proxy failures.
@@ -168,6 +188,7 @@ impl BrowserRunner {
       // Start the proxy and get local proxy settings
       // If proxy startup fails, DO NOT launch Camoufox - it requires local proxy
       let profile_id_str = profile.id.to_string();
+      let blocklist_file = Self::resolve_blocklist_file(profile).await?;
       let local_proxy = PROXY_MANAGER
         .start_proxy(
           app_handle.clone(),
@@ -175,6 +196,7 @@ impl BrowserRunner {
           0, // Use 0 as temporary PID, will be updated later
           Some(&profile_id_str),
           profile.proxy_bypass_rules.clone(),
+          blocklist_file,
         )
         .await
         .map_err(|e| {
@@ -427,6 +449,7 @@ impl BrowserRunner {
       // Start the proxy and get local proxy settings
       // If proxy startup fails, DO NOT launch Wayfern - it requires local proxy
       let profile_id_str = profile.id.to_string();
+      let blocklist_file = Self::resolve_blocklist_file(profile).await?;
       let local_proxy = PROXY_MANAGER
         .start_proxy(
           app_handle.clone(),
@@ -434,6 +457,7 @@ impl BrowserRunner {
           0, // Use 0 as temporary PID, will be updated later
           Some(&profile_id_str),
           profile.proxy_bypass_rules.clone(),
+          blocklist_file,
         )
         .await
         .map_err(|e| {
@@ -751,6 +775,9 @@ impl BrowserRunner {
     let profile_id_str = profile.id.to_string();
 
     // Start local proxy - if this fails, DO NOT launch browser
+    let blocklist_file = Self::resolve_blocklist_file(profile)
+      .await
+      .map_err(|e| -> Box<dyn std::error::Error + Send + Sync> { e.into() })?;
     let internal_proxy = PROXY_MANAGER
       .start_proxy(
         app_handle.clone(),
@@ -758,6 +785,7 @@ impl BrowserRunner {
         temp_pid,
         Some(&profile_id_str),
         profile.proxy_bypass_rules.clone(),
+        blocklist_file,
       )
       .await
       .map_err(|e| {
@@ -2280,6 +2308,7 @@ pub async fn launch_browser_profile(
 
     // Always start a local proxy, even if there's no upstream proxy
     // This allows for traffic monitoring and future features
+    let blocklist_file = BrowserRunner::resolve_blocklist_file(&profile_for_launch).await?;
     match PROXY_MANAGER
       .start_proxy(
         app_handle.clone(),
@@ -2287,6 +2316,7 @@ pub async fn launch_browser_profile(
         temp_pid,
         Some(&profile_id_str),
         profile_for_launch.proxy_bypass_rules.clone(),
+        blocklist_file,
       )
       .await
     {

src-tauri/src/dns_blocklist.rs

@@ -0,0 +1,343 @@
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+use std::time::{Duration, SystemTime};
+
+use crate::app_dirs;
+
+const REFRESH_INTERVAL: Duration = Duration::from_secs(43200); // 12 hours
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum BlocklistLevel {
+  #[default]
+  None,
+  Light,
+  Normal,
+  Pro,
+  ProPlus,
+  Ultimate,
+}
+
+impl BlocklistLevel {
+  pub fn parse_level(s: &str) -> Option<Self> {
+    match s {
+      "light" => Some(Self::Light),
+      "normal" => Some(Self::Normal),
+      "pro" => Some(Self::Pro),
+      "pro_plus" => Some(Self::ProPlus),
+      "ultimate" => Some(Self::Ultimate),
+      "none" => Some(Self::None),
+      _ => None,
+    }
+  }
+
+  pub fn as_str(&self) -> &'static str {
+    match self {
+      Self::None => "none",
+      Self::Light => "light",
+      Self::Normal => "normal",
+      Self::Pro => "pro",
+      Self::ProPlus => "pro_plus",
+      Self::Ultimate => "ultimate",
+    }
+  }
+
+  pub fn display_name(&self) -> &'static str {
+    match self {
+      Self::None => "None",
+      Self::Light => "Light",
+      Self::Normal => "Normal",
+      Self::Pro => "Pro",
+      Self::ProPlus => "Pro++",
+      Self::Ultimate => "Ultimate",
+    }
+  }
+
+  pub fn url(&self) -> Option<&'static str> {
+    match self {
+      Self::None => None,
+      Self::Light => {
+        Some("https://cdn.jsdelivr.net/gh/hagezi/dns-blocklists@latest/domains/light.txt")
+      }
+      Self::Normal => {
+        Some("https://cdn.jsdelivr.net/gh/hagezi/dns-blocklists@latest/domains/multi.txt")
+      }
+      Self::Pro => Some("https://cdn.jsdelivr.net/gh/hagezi/dns-blocklists@latest/domains/pro.txt"),
+      Self::ProPlus => {
+        Some("https://cdn.jsdelivr.net/gh/hagezi/dns-blocklists@latest/domains/pro.plus.txt")
+      }
+      Self::Ultimate => {
+        Some("https://cdn.jsdelivr.net/gh/hagezi/dns-blocklists@latest/domains/ultimate.txt")
+      }
+    }
+  }
+
+  pub fn filename(&self) -> Option<&'static str> {
+    match self {
+      Self::None => None,
+      Self::Light => Some("light.txt"),
+      Self::Normal => Some("multi.txt"),
+      Self::Pro => Some("pro.txt"),
+      Self::ProPlus => Some("pro.plus.txt"),
+      Self::Ultimate => Some("ultimate.txt"),
+    }
+  }
+
+  pub fn all_downloadable() -> &'static [BlocklistLevel] {
+    &[
+      Self::Light,
+      Self::Normal,
+      Self::Pro,
+      Self::ProPlus,
+      Self::Ultimate,
+    ]
+  }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BlocklistCacheStatus {
+  pub level: String,
+  pub display_name: String,
+  pub entry_count: usize,
+  pub file_size_bytes: u64,
+  pub last_updated: Option<u64>,
+  pub is_fresh: bool,
+  pub is_cached: bool,
+}
+
+pub struct BlocklistManager;
+
+lazy_static::lazy_static! {
+  static ref HTTP_CLIENT: reqwest::Client = reqwest::Client::builder()
+    .timeout(Duration::from_secs(60))
+    .build()
+    .expect("Failed to create HTTP client");
+}
+
+impl BlocklistManager {
+  pub fn instance() -> &'static BlocklistManager {
+    &BLOCKLIST_MANAGER
+  }
+
+  fn cache_dir() -> PathBuf {
+    app_dirs::dns_blocklist_dir()
+  }
+
+  pub fn cached_file_path(level: BlocklistLevel) -> Option<PathBuf> {
+    level.filename().map(|f| Self::cache_dir().join(f))
+  }
+
+  pub fn is_cache_fresh(level: BlocklistLevel) -> bool {
+    let Some(path) = Self::cached_file_path(level) else {
+      return false;
+    };
+    if !path.exists() {
+      return false;
+    }
+    match std::fs::metadata(&path).and_then(|m| m.modified()) {
+      Ok(modified) => SystemTime::now()
+        .duration_since(modified)
+        .map(|age| age < REFRESH_INTERVAL)
+        .unwrap_or(false),
+      Err(_) => false,
+    }
+  }
+
+  pub async fn fetch_blocklist(level: BlocklistLevel) -> Result<PathBuf, String> {
+    let url = level
+      .url()
+      .ok_or_else(|| format!("No URL for level {:?}", level))?;
+    let path =
+      Self::cached_file_path(level).ok_or_else(|| format!("No filename for level {:?}", level))?;
+
+    let cache_dir = Self::cache_dir();
+    std::fs::create_dir_all(&cache_dir).map_err(|e| format!("Failed to create cache dir: {e}"))?;
+
+    log::info!(
+      "[dns-blocklist] Fetching {} from {}",
+      level.display_name(),
+      url
+    );
+
+    let response = HTTP_CLIENT
+      .get(url)
+      .send()
+      .await
+      .map_err(|e| format!("Failed to fetch blocklist: {e}"))?;
+
+    if !response.status().is_success() {
+      return Err(format!("HTTP {} when fetching {}", response.status(), url));
+    }
+
+    let body = response
+      .text()
+      .await
+      .map_err(|e| format!("Failed to read response body: {e}"))?;
+
+    // Write atomically: write to temp file, then rename
+    let tmp_path = path.with_extension("tmp");
+    std::fs::write(&tmp_path, &body).map_err(|e| format!("Failed to write blocklist: {e}"))?;
+    std::fs::rename(&tmp_path, &path).map_err(|e| format!("Failed to rename blocklist: {e}"))?;
+
+    let entry_count = body
+      .lines()
+      .filter(|l| !l.starts_with('#') && !l.trim().is_empty())
+      .count();
+    log::info!(
+      "[dns-blocklist] Cached {} ({} domains)",
+      level.display_name(),
+      entry_count
+    );
+
+    Ok(path)
+  }
+
+  pub async fn ensure_cached(level: BlocklistLevel) -> Result<PathBuf, String> {
+    if let Some(path) = Self::cached_file_path(level) {
+      if path.exists() {
+        return Ok(path);
+      }
+    }
+    Self::fetch_blocklist(level).await
+  }
+
+  pub async fn refresh_all_stale(&self) {
+    for &level in BlocklistLevel::all_downloadable() {
+      if !Self::is_cache_fresh(level) {
+        if let Err(e) = Self::fetch_blocklist(level).await {
+          log::error!(
+            "[dns-blocklist] Failed to refresh {}: {e}",
+            level.display_name()
+          );
+          let _ = crate::events::emit(
+            "dns-blocklist-refresh-failed",
+            serde_json::json!({
+              "level": level.as_str(),
+              "error": e,
+            }),
+          );
+        }
+      }
+    }
+  }
+
+  pub fn get_blocklist_file_path(level: BlocklistLevel) -> Option<PathBuf> {
+    Self::cached_file_path(level).filter(|p| p.exists())
+  }
+
+  pub fn get_cache_status() -> Vec<BlocklistCacheStatus> {
+    BlocklistLevel::all_downloadable()
+      .iter()
+      .map(|&level| {
+        let path = Self::cached_file_path(level);
+        let metadata = path.as_ref().and_then(|p| std::fs::metadata(p).ok());
+        let is_cached = metadata.is_some();
+
+        let entry_count = if is_cached {
+          path
+            .as_ref()
+            .and_then(|p| std::fs::read_to_string(p).ok())
+            .map(|content| {
+              content
+                .lines()
+                .filter(|l| !l.starts_with('#') && !l.trim().is_empty())
+                .count()
+            })
+            .unwrap_or(0)
+        } else {
+          0
+        };
+
+        let file_size_bytes = metadata.as_ref().map(|m| m.len()).unwrap_or(0);
+
+        let last_updated = metadata
+          .as_ref()
+          .and_then(|m| m.modified().ok())
+          .and_then(|t| t.duration_since(SystemTime::UNIX_EPOCH).ok())
+          .map(|d| d.as_secs());
+
+        BlocklistCacheStatus {
+          level: level.as_str().to_string(),
+          display_name: level.display_name().to_string(),
+          entry_count,
+          file_size_bytes,
+          last_updated,
+          is_fresh: Self::is_cache_fresh(level),
+          is_cached,
+        }
+      })
+      .collect()
+  }
+}
+
+lazy_static::lazy_static! {
+  static ref BLOCKLIST_MANAGER: BlocklistManager = BlocklistManager;
+}
+
+// Tauri commands
+
+#[tauri::command]
+pub async fn get_dns_blocklist_cache_status() -> Result<Vec<BlocklistCacheStatus>, String> {
+  Ok(BlocklistManager::get_cache_status())
+}
+
+#[tauri::command]
+pub async fn refresh_dns_blocklists() -> Result<(), String> {
+  for &level in BlocklistLevel::all_downloadable() {
+    BlocklistManager::fetch_blocklist(level).await?;
+  }
+  Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn test_level_roundtrip() {
+    for &level in BlocklistLevel::all_downloadable() {
+      let s = level.as_str();
+      let parsed = BlocklistLevel::parse_level(s);
+      assert_eq!(parsed, Some(level), "Roundtrip failed for {s}");
+    }
+    assert_eq!(
+      BlocklistLevel::parse_level("none"),
+      Some(BlocklistLevel::None)
+    );
+  }
+
+  #[test]
+  fn test_level_urls_all_present() {
+    for &level in BlocklistLevel::all_downloadable() {
+      assert!(
+        level.url().is_some(),
+        "{} should have a URL",
+        level.as_str()
+      );
+      assert!(
+        level.filename().is_some(),
+        "{} should have a filename",
+        level.as_str()
+      );
+    }
+    assert!(BlocklistLevel::None.url().is_none());
+    assert!(BlocklistLevel::None.filename().is_none());
+  }
+
+  #[test]
+  fn test_cache_status_returns_all_levels() {
+    let statuses = BlocklistManager::get_cache_status();
+    assert_eq!(statuses.len(), 5);
+    assert_eq!(statuses[0].level, "light");
+    assert_eq!(statuses[1].level, "normal");
+    assert_eq!(statuses[2].level, "pro");
+    assert_eq!(statuses[3].level, "pro_plus");
+    assert_eq!(statuses[4].level, "ultimate");
+  }
+
+  #[test]
+  fn test_cache_fresh_returns_false_when_missing() {
+    assert!(!BlocklistManager::is_cache_fresh(BlocklistLevel::Light));
+    assert!(!BlocklistManager::is_cache_fresh(BlocklistLevel::None));
+  }
+}

src-tauri/src/ephemeral_dirs.rs

@@ -277,6 +277,7 @@ mod tests {
       proxy_bypass_rules: Vec::new(),
       created_by_id: None,
       created_by_email: None,
+      dns_blocklist: None,
     }
   }
 

src-tauri/src/lib.rs

@@ -19,6 +19,7 @@ mod browser_version_manager;
 pub mod camoufox;
 mod camoufox_manager;
 mod default_browser;
+pub mod dns_blocklist;
 mod downloaded_browsers_registry;
 mod downloader;
 mod ephemeral_dirs;
@@ -65,9 +66,9 @@ use browser_runner::{
 
 use profile::manager::{
   check_browser_status, clone_profile, create_browser_profile_new, delete_profile,
-  list_browser_profiles, rename_profile, update_camoufox_config, update_profile_note,
-  update_profile_proxy, update_profile_proxy_bypass_rules, update_profile_tags, update_profile_vpn,
-  update_wayfern_config,
+  list_browser_profiles, rename_profile, update_camoufox_config, update_profile_dns_blocklist,
+  update_profile_note, update_profile_proxy, update_profile_proxy_bypass_rules,
+  update_profile_tags, update_profile_vpn, update_wayfern_config,
 };
 
 use browser_version_manager::{
@@ -1132,6 +1133,7 @@ async fn generate_sample_fingerprint(
     proxy_bypass_rules: Vec::new(),
     created_by_id: None,
     created_by_email: None,
+    dns_blocklist: None,
   };
 
   if browser == "camoufox" {
@@ -1462,6 +1464,17 @@ pub fn run() {
         }
       });
 
+      // DNS blocklist refresh task (every 12 hours)
+      tauri::async_runtime::spawn(async move {
+        let manager = dns_blocklist::BlocklistManager::instance();
+        let mut interval = tokio::time::interval(tokio::time::Duration::from_secs(43200));
+        interval.tick().await; // Skip the immediate first tick
+        loop {
+          interval.tick().await;
+          manager.refresh_all_stale().await;
+        }
+      });
+
       tauri::async_runtime::spawn(async move {
         let updater = app_auto_updater::AppAutoUpdater::instance();
         let mut interval = tokio::time::interval(tokio::time::Duration::from_secs(3 * 60 * 60));
@@ -1805,6 +1818,7 @@ pub fn run() {
       update_profile_tags,
       update_profile_note,
       update_profile_proxy_bypass_rules,
+      update_profile_dns_blocklist,
       check_browser_status,
       kill_browser_profile,
       rename_profile,
@@ -1952,6 +1966,9 @@ pub fn run() {
       synchronizer::stop_sync_session,
       synchronizer::remove_sync_follower,
       synchronizer::get_sync_sessions,
+      // DNS blocklist commands
+      dns_blocklist::get_dns_blocklist_cache_status,
+      dns_blocklist::refresh_dns_blocklists,
     ])
     .build(tauri::generate_context!())
     .expect("error while building tauri application")

src-tauri/src/mcp_server.rs

@@ -1009,6 +1009,36 @@ impl McpServer {
           "required": ["profile_id", "rules"]
         }),
       },
+      McpTool {
+        name: "update_profile_dns_blocklist".to_string(),
+        description:
+          "Update the DNS blocklist level for a profile. Blocks ads, trackers, and malware domains at the proxy level."
+            .to_string(),
+        input_schema: serde_json::json!({
+          "type": "object",
+          "properties": {
+            "profile_id": {
+              "type": "string",
+              "description": "The UUID of the profile to update"
+            },
+            "level": {
+              "type": "string",
+              "enum": ["none", "light", "normal", "pro", "pro_plus", "ultimate"],
+              "description": "DNS blocklist level. 'none' disables blocking."
+            }
+          },
+          "required": ["profile_id", "level"]
+        }),
+      },
+      McpTool {
+        name: "get_dns_blocklist_status".to_string(),
+        description: "Get the cache status of all DNS blocklist tiers including entry counts and freshness.".to_string(),
+        input_schema: serde_json::json!({
+          "type": "object",
+          "properties": {},
+          "required": []
+        }),
+      },
       McpTool {
         name: "list_extensions".to_string(),
         description: "List all managed browser extensions. Requires Pro subscription.".to_string(),
@@ -1482,6 +1512,9 @@ impl McpServer {
           .handle_update_profile_proxy_bypass_rules(&arguments)
           .await
       }
+      // DNS blocklist management
+      "update_profile_dns_blocklist" => self.handle_update_profile_dns_blocklist(&arguments).await,
+      "get_dns_blocklist_status" => self.handle_get_dns_blocklist_status().await,
       // Extension management
       "list_extensions" => self.handle_list_extensions().await,
       "list_extension_groups" => self.handle_list_extension_groups().await,
@@ -1806,6 +1839,7 @@ impl McpServer {
     let mut profile = ProfileManager::instance()
       .create_profile_with_group(
         app_handle, name, browser, version, "stable", proxy_id, None, None, None, group_id, false,
+        None,
       )
       .await
       .map_err(|e| McpError {
@@ -3119,6 +3153,61 @@ impl McpServer {
     }))
   }
 
+  async fn handle_update_profile_dns_blocklist(
+    &self,
+    arguments: &serde_json::Value,
+  ) -> Result<serde_json::Value, McpError> {
+    let profile_id = arguments
+      .get("profile_id")
+      .and_then(|v| v.as_str())
+      .ok_or_else(|| McpError {
+        code: -32602,
+        message: "Missing profile_id".to_string(),
+      })?;
+
+    let level = arguments
+      .get("level")
+      .and_then(|v| v.as_str())
+      .ok_or_else(|| McpError {
+        code: -32602,
+        message: "Missing level".to_string(),
+      })?;
+
+    let dns_blocklist = if level == "none" {
+      None
+    } else {
+      Some(level.to_string())
+    };
+
+    let profile = ProfileManager::instance()
+      .update_profile_dns_blocklist(profile_id, dns_blocklist)
+      .map_err(|e| McpError {
+        code: -32000,
+        message: format!("Failed to update DNS blocklist: {e}"),
+      })?;
+
+    Ok(serde_json::json!({
+      "content": [{
+        "type": "text",
+        "text": format!(
+          "DNS blocklist updated for profile '{}': {}",
+          profile.name,
+          level
+        )
+      }]
+    }))
+  }
+
+  async fn handle_get_dns_blocklist_status(&self) -> Result<serde_json::Value, McpError> {
+    let statuses = crate::dns_blocklist::BlocklistManager::get_cache_status();
+    Ok(serde_json::json!({
+      "content": [{
+        "type": "text",
+        "text": serde_json::to_string_pretty(&statuses).unwrap_or_default()
+      }]
+    }))
+  }
+
   async fn handle_list_extensions(&self) -> Result<serde_json::Value, McpError> {
     if !CLOUD_AUTH.has_active_paid_subscription().await {
       return Err(McpError {

src-tauri/src/profile/manager.rs

@@ -50,6 +50,7 @@ impl ProfileManager {
     wayfern_config: Option<WayfernConfig>,
     group_id: Option<String>,
     ephemeral: bool,
+    dns_blocklist: Option<String>,
   ) -> Result<BrowserProfile, Box<dyn std::error::Error>> {
     if proxy_id.is_some() && vpn_id.is_some() {
       return Err("Cannot set both proxy_id and vpn_id".into());
@@ -158,6 +159,7 @@ impl ProfileManager {
           proxy_bypass_rules: Vec::new(),
           created_by_id: None,
           created_by_email: None,
+          dns_blocklist: None,
         };
 
         match self
@@ -257,6 +259,7 @@ impl ProfileManager {
           proxy_bypass_rules: Vec::new(),
           created_by_id: None,
           created_by_email: None,
+          dns_blocklist: None,
         };
 
         match self
@@ -310,6 +313,7 @@ impl ProfileManager {
       proxy_bypass_rules: Vec::new(),
       created_by_id: None,
       created_by_email: None,
+      dns_blocklist,
     };
 
     // Save profile info
@@ -760,6 +764,30 @@ impl ProfileManager {
     Ok(profile)
   }
 
+  pub fn update_profile_dns_blocklist(
+    &self,
+    profile_id: &str,
+    dns_blocklist: Option<String>,
+  ) -> Result<BrowserProfile, Box<dyn std::error::Error>> {
+    let profile_uuid =
+      uuid::Uuid::parse_str(profile_id).map_err(|_| format!("Invalid profile ID: {profile_id}"))?;
+    let profiles = self.list_profiles()?;
+    let mut profile = profiles
+      .into_iter()
+      .find(|p| p.id == profile_uuid)
+      .ok_or_else(|| format!("Profile with ID '{profile_id}' not found"))?;
+
+    profile.dns_blocklist = dns_blocklist;
+
+    self.save_profile(&profile)?;
+
+    if let Err(e) = events::emit_empty("profiles-changed") {
+      log::warn!("Warning: Failed to emit profiles-changed event: {e}");
+    }
+
+    Ok(profile)
+  }
+
   pub fn delete_multiple_profiles(
     &self,
     app_handle: &tauri::AppHandle,
@@ -902,6 +930,7 @@ impl ProfileManager {
       proxy_bypass_rules: source.proxy_bypass_rules,
       created_by_id: None,
       created_by_email: None,
+      dns_blocklist: source.dns_blocklist,
     };
 
     self.save_profile(&new_profile)?;
@@ -1957,6 +1986,7 @@ pub async fn create_browser_profile_with_group(
   wayfern_config: Option<WayfernConfig>,
   group_id: Option<String>,
   ephemeral: bool,
+  dns_blocklist: Option<String>,
 ) -> Result<BrowserProfile, String> {
   let profile_manager = ProfileManager::instance();
   profile_manager
@@ -1972,6 +2002,7 @@ pub async fn create_browser_profile_with_group(
       wayfern_config,
       group_id,
       ephemeral,
+      dns_blocklist,
     )
     .await
     .map_err(|e| format!("Failed to create profile: {e}"))
@@ -2047,6 +2078,17 @@ pub fn update_profile_proxy_bypass_rules(
     .map_err(|e| format!("Failed to update proxy bypass rules: {e}"))
 }
 
+#[tauri::command]
+pub fn update_profile_dns_blocklist(
+  profile_id: String,
+  dns_blocklist: Option<String>,
+) -> Result<BrowserProfile, String> {
+  let profile_manager = ProfileManager::instance();
+  profile_manager
+    .update_profile_dns_blocklist(&profile_id, dns_blocklist)
+    .map_err(|e| format!("Failed to update DNS blocklist: {e}"))
+}
+
 #[tauri::command]
 pub async fn check_browser_status(
   app_handle: tauri::AppHandle,
@@ -2085,6 +2127,7 @@ pub async fn create_browser_profile_new(
   wayfern_config: Option<WayfernConfig>,
   group_id: Option<String>,
   ephemeral: Option<bool>,
+  dns_blocklist: Option<String>,
 ) -> Result<BrowserProfile, String> {
   let fingerprint_os = camoufox_config
     .as_ref()
@@ -2112,6 +2155,7 @@ pub async fn create_browser_profile_new(
     wayfern_config,
     group_id,
     ephemeral.unwrap_or(false),
+    dns_blocklist,
   )
   .await
 }

src-tauri/src/profile/types.rs

@@ -65,6 +65,8 @@ pub struct BrowserProfile {
   pub created_by_id: Option<String>,
   #[serde(default)]
   pub created_by_email: Option<String>,
+  #[serde(default)]
+  pub dns_blocklist: Option<String>,
 }
 
 pub fn default_release_type() -> String {

src-tauri/src/profile_importer.rs

@@ -582,6 +582,7 @@ impl ProfileImporter {
           proxy_bypass_rules: Vec::new(),
           created_by_id: None,
           created_by_email: None,
+          dns_blocklist: None,
         };
 
         match self
@@ -660,6 +661,7 @@ impl ProfileImporter {
           proxy_bypass_rules: Vec::new(),
           created_by_id: None,
           created_by_email: None,
+          dns_blocklist: None,
         };
 
         match self
@@ -709,6 +711,7 @@ impl ProfileImporter {
       proxy_bypass_rules: Vec::new(),
       created_by_id: None,
       created_by_email: None,
+      dns_blocklist: None,
     };
 
     self.profile_manager.save_profile(&profile)?;

src-tauri/src/proxy_manager.rs

@@ -77,6 +77,7 @@ pub struct ProxyInfo {
   pub local_port: u16,
   // Optional profile ID to which this proxy instance is logically tied
   pub profile_id: Option<String>,
+  pub blocklist_file: Option<String>,
 }
 
 // Proxy check result cache
@@ -1675,6 +1676,7 @@ impl ProxyManager {
     browser_pid: u32,
     profile_id: Option<&str>,
     bypass_rules: Vec<String>,
+    blocklist_file: Option<String>,
   ) -> Result<ProxySettings, String> {
     if let Some(name) = profile_id {
       // Check if we have an active proxy recorded for this profile
@@ -1802,6 +1804,11 @@ impl ProxyManager {
       proxy_cmd = proxy_cmd.arg("--bypass-rules").arg(rules_json);
     }
 
+    // Add blocklist file path if provided
+    if let Some(ref path) = blocklist_file {
+      proxy_cmd = proxy_cmd.arg("--blocklist-file").arg(path);
+    }
+
     // Execute the command and wait for it to complete
     // The donut-proxy binary should start the worker and then exit
     let output = proxy_cmd
@@ -1847,6 +1854,7 @@ impl ProxyManager {
         .unwrap_or_else(|| "DIRECT".to_string()),
       local_port,
       profile_id: profile_id.map(|s| s.to_string()),
+      blocklist_file: blocklist_file.clone(),
     };
 
     // Wait for the local proxy port to be ready to accept connections
@@ -2345,6 +2353,7 @@ mod tests {
           upstream_type: "http".to_string(),
           local_port: (8000 + i) as u16,
           profile_id: None,
+          blocklist_file: None,
         };
 
         // Add proxy
@@ -2671,6 +2680,7 @@ mod tests {
       upstream_type: "http".to_string(),
       local_port: port,
       profile_id: profile_id.map(|s| s.to_string()),
+      blocklist_file: None,
     }
   }
 
@@ -2898,6 +2908,7 @@ mod tests {
       pid: Some(live_pid),
       profile_id: None,
       bypass_rules: Vec::new(),
+      blocklist_file: None,
     };
     let dead_config = ProxyConfig {
       id: dead_id.clone(),
@@ -2908,6 +2919,7 @@ mod tests {
       pid: Some(dead_pid),
       profile_id: None,
       bypass_rules: Vec::new(),
+      blocklist_file: None,
     };
 
     save_proxy_config(&live_config).unwrap();
@@ -2946,6 +2958,7 @@ mod tests {
       pid: Some(12345),
       profile_id: Some("prof_abc".to_string()),
       bypass_rules: vec!["*.local".to_string(), "192.168.*".to_string()],
+      blocklist_file: None,
     };
 
     // Save
@@ -3064,6 +3077,7 @@ mod tests {
       upstream_type: "http".to_string(),
       local_port: 9201,
       profile_id: Some("profile_alpha".to_string()),
+      blocklist_file: None,
     };
     let info_b = ProxyInfo {
       id: "px_shared_b".to_string(),
@@ -3073,6 +3087,7 @@ mod tests {
       upstream_type: "http".to_string(),
       local_port: 9202,
       profile_id: Some("profile_beta".to_string()),
+      blocklist_file: None,
     };
 
     pm.insert_active_proxy(3001, info_a);
@@ -3260,6 +3275,7 @@ mod tests {
       pid: Some(dead_pid),
       profile_id: None,
       bypass_rules: Vec::new(),
+      blocklist_file: None,
     };
     save_proxy_config(&config).unwrap();
 
@@ -3432,6 +3448,7 @@ mod tests {
         upstream_type: ptype.to_string(),
         local_port: 9300 + i as u16,
         profile_id: Some(format!("profile_{ptype}")),
+        blocklist_file: None,
       };
       pm.insert_active_proxy(4000 + i as u32, info);
     }

src-tauri/src/proxy_runner.rs

@@ -12,7 +12,7 @@ pub async fn start_proxy_process(
   upstream_url: Option<String>,
   port: Option<u16>,
 ) -> Result<ProxyConfig, Box<dyn std::error::Error>> {
-  start_proxy_process_with_profile(upstream_url, port, None, Vec::new()).await
+  start_proxy_process_with_profile(upstream_url, port, None, Vec::new(), None).await
 }
 
 pub async fn start_proxy_process_with_profile(
@@ -20,6 +20,7 @@ pub async fn start_proxy_process_with_profile(
   port: Option<u16>,
   profile_id: Option<String>,
   bypass_rules: Vec<String>,
+  blocklist_file: Option<String>,
 ) -> Result<ProxyConfig, Box<dyn std::error::Error>> {
   let id = generate_proxy_id();
   let upstream = upstream_url.unwrap_or_else(|| "DIRECT".to_string());
@@ -33,7 +34,8 @@ pub async fn start_proxy_process_with_profile(
 
   let config = ProxyConfig::new(id.clone(), upstream, Some(local_port))
     .with_profile_id(profile_id.clone())
-    .with_bypass_rules(bypass_rules);
+    .with_bypass_rules(bypass_rules)
+    .with_blocklist_file(blocklist_file);
   save_proxy_config(&config)?;
 
   // Log profile_id for debugging

src-tauri/src/proxy_server.rs

@@ -7,6 +7,7 @@ use hyper::service::service_fn;
 use hyper::{Method, Request, Response, StatusCode};
 use hyper_util::rt::TokioIo;
 use regex_lite::Regex;
+use std::collections::HashSet;
 use std::convert::Infallible;
 use std::io;
 use std::net::SocketAddr;
@@ -51,6 +52,58 @@ impl BypassMatcher {
   }
 }
 
+#[derive(Clone)]
+pub struct BlocklistMatcher {
+  domains: Arc<HashSet<String>>,
+}
+
+impl Default for BlocklistMatcher {
+  fn default() -> Self {
+    Self::new()
+  }
+}
+
+impl BlocklistMatcher {
+  pub fn new() -> Self {
+    Self {
+      domains: Arc::new(HashSet::new()),
+    }
+  }
+
+  pub fn from_file(path: &str) -> Result<Self, Box<dyn std::error::Error>> {
+    let content = std::fs::read_to_string(path)?;
+    let domains: HashSet<String> = content
+      .lines()
+      .filter(|line| !line.starts_with('#') && !line.trim().is_empty())
+      .map(|line| line.trim().to_lowercase())
+      .collect();
+    log::info!("[blocklist] Loaded {} domains from {}", domains.len(), path);
+    Ok(Self {
+      domains: Arc::new(domains),
+    })
+  }
+
+  pub fn is_blocked(&self, host: &str) -> bool {
+    if self.domains.is_empty() {
+      return false;
+    }
+    let host_lower = host.to_lowercase();
+    // Exact match
+    if self.domains.contains(host_lower.as_str()) {
+      return true;
+    }
+    // Suffix matching: check parent domains (like uBlock)
+    let mut start = 0;
+    while let Some(dot_pos) = host_lower[start..].find('.') {
+      start += dot_pos + 1;
+      if self.domains.contains(&host_lower[start..]) {
+        return true;
+      }
+    }
+    false
+  }
+}
+
 /// Wrapper stream that counts bytes read and written
 struct CountingStream<S> {
   inner: S,
@@ -167,20 +220,22 @@ async fn handle_request(
   req: Request<hyper::body::Incoming>,
   upstream_url: Option<String>,
   bypass_matcher: BypassMatcher,
+  blocklist_matcher: BlocklistMatcher,
 ) -> Result<Response<Full<Bytes>>, Infallible> {
   // Handle CONNECT method for HTTPS tunneling
   if req.method() == Method::CONNECT {
-    return handle_connect(req, upstream_url, bypass_matcher).await;
+    return handle_connect(req, upstream_url, bypass_matcher, blocklist_matcher).await;
   }
 
   // Handle regular HTTP requests
-  handle_http(req, upstream_url, bypass_matcher).await
+  handle_http(req, upstream_url, bypass_matcher, blocklist_matcher).await
 }
 
 async fn handle_connect(
   req: Request<hyper::body::Incoming>,
   upstream_url: Option<String>,
   bypass_matcher: BypassMatcher,
+  blocklist_matcher: BlocklistMatcher,
 ) -> Result<Response<Full<Bytes>>, Infallible> {
   let authority = req.uri().authority().cloned();
 
@@ -196,6 +251,14 @@ async fn handle_connect(
       (&target_addr[..], 443)
     };
 
+    // Block if domain is in the DNS blocklist (before any connection)
+    if blocklist_matcher.is_blocked(target_host) {
+      log::debug!("[blocklist] Blocked CONNECT to {}", target_host);
+      let mut response = Response::new(Full::new(Bytes::from("Blocked by DNS blocklist")));
+      *response.status_mut() = StatusCode::FORBIDDEN;
+      return Ok(response);
+    }
+
     // If no upstream proxy, or bypass rule matches, connect directly
     if upstream_url.is_none()
       || upstream_url
@@ -711,6 +774,7 @@ async fn handle_http(
   req: Request<hyper::body::Incoming>,
   upstream_url: Option<String>,
   bypass_matcher: BypassMatcher,
+  blocklist_matcher: BlocklistMatcher,
 ) -> Result<Response<Full<Bytes>>, Infallible> {
   // Extract domain for traffic tracking
   let domain = req
@@ -719,6 +783,14 @@ async fn handle_http(
     .map(|h| h.to_string())
     .unwrap_or_else(|| "unknown".to_string());
 
+  // Block if domain is in the DNS blocklist (before any connection)
+  if blocklist_matcher.is_blocked(&domain) {
+    log::debug!("[blocklist] Blocked HTTP request to {}", domain);
+    let mut response = Response::new(Full::new(Bytes::from("Blocked by DNS blocklist")));
+    *response.status_mut() = StatusCode::FORBIDDEN;
+    return Ok(response);
+  }
+
   log::error!(
     "DEBUG: Handling HTTP request: {} {} (host: {:?})",
     req.method(),
@@ -888,6 +960,7 @@ pub async fn handle_proxy_connection(
   mut stream: tokio::net::TcpStream,
   upstream_url: Option<String>,
   bypass_matcher: BypassMatcher,
+  blocklist_matcher: BlocklistMatcher,
 ) {
   let _ = stream.set_nodelay(true);
 
@@ -942,8 +1015,14 @@ pub async fn handle_proxy_connection(
           }
         }
 
-        let _ =
-          handle_connect_from_buffer(stream, full_request, upstream_url, bypass_matcher).await;
+        let _ = handle_connect_from_buffer(
+          stream,
+          full_request,
+          upstream_url,
+          bypass_matcher,
+          blocklist_matcher,
+        )
+        .await;
         return;
       }
 
@@ -955,8 +1034,14 @@ pub async fn handle_proxy_connection(
         inner: stream,
       };
       let io = TokioIo::new(prepended_reader);
-      let service =
-        service_fn(move |req| handle_request(req, upstream_url.clone(), bypass_matcher.clone()));
+      let service = service_fn(move |req| {
+        handle_request(
+          req,
+          upstream_url.clone(),
+          bypass_matcher.clone(),
+          blocklist_matcher.clone(),
+        )
+      });
 
       let _ = http1::Builder::new().serve_connection(io, service).await;
     }
@@ -1128,6 +1213,17 @@ pub async fn run_proxy_server(config: ProxyConfig) -> Result<(), Box<dyn std::er
   });
 
   let bypass_matcher = BypassMatcher::new(&config.bypass_rules);
+  let blocklist_matcher = if let Some(ref path) = config.blocklist_file {
+    match BlocklistMatcher::from_file(path) {
+      Ok(m) => m,
+      Err(e) => {
+        log::error!("[blocklist] Failed to load from {}: {}", path, e);
+        BlocklistMatcher::new()
+      }
+    }
+  } else {
+    BlocklistMatcher::new()
+  };
 
   // Keep the runtime alive with an infinite loop
   // This ensures the process doesn't exit even if there are no active connections
@@ -1136,8 +1232,9 @@ pub async fn run_proxy_server(config: ProxyConfig) -> Result<(), Box<dyn std::er
       Ok((stream, _peer_addr)) => {
         let upstream = upstream_url.clone();
         let matcher = bypass_matcher.clone();
+        let blocker = blocklist_matcher.clone();
         tokio::task::spawn(async move {
-          handle_proxy_connection(stream, upstream, matcher).await;
+          handle_proxy_connection(stream, upstream, matcher, blocker).await;
         });
       }
       Err(e) => {
@@ -1155,6 +1252,7 @@ async fn handle_connect_from_buffer(
   request_buffer: Vec<u8>,
   upstream_url: Option<String>,
   bypass_matcher: BypassMatcher,
+  blocklist_matcher: BlocklistMatcher,
 ) -> Result<(), Box<dyn std::error::Error>> {
   // Parse the CONNECT request from the buffer
   let request_str = String::from_utf8_lossy(&request_buffer);
@@ -1185,6 +1283,15 @@ async fn handle_connect_from_buffer(
     (target, 443)
   };
 
+  // Block if domain is in the DNS blocklist (before any connection)
+  if blocklist_matcher.is_blocked(target_host) {
+    log::debug!("[blocklist] Blocked CONNECT tunnel to {}", target_host);
+    let _ = client_stream
+      .write_all(b"HTTP/1.1 403 Forbidden\r\nContent-Length: 24\r\n\r\nBlocked by DNS blocklist")
+      .await;
+    return Ok(());
+  }
+
   // Record domain access in traffic tracker
   let domain = target_host.to_string();
   if let Some(tracker) = get_traffic_tracker() {
@@ -1362,3 +1469,106 @@ async fn handle_connect_from_buffer(
 
   Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use std::io::Write;
+
+  #[test]
+  fn test_blocklist_exact_match() {
+    let mut matcher = BlocklistMatcher::new();
+    let mut domains = HashSet::new();
+    domains.insert("example.com".to_string());
+    domains.insert("tracker.net".to_string());
+    matcher.domains = Arc::new(domains);
+
+    assert!(matcher.is_blocked("example.com"));
+    assert!(matcher.is_blocked("tracker.net"));
+    assert!(!matcher.is_blocked("safe.com"));
+  }
+
+  #[test]
+  fn test_blocklist_subdomain_match() {
+    let mut matcher = BlocklistMatcher::new();
+    let mut domains = HashSet::new();
+    domains.insert("example.com".to_string());
+    matcher.domains = Arc::new(domains);
+
+    assert!(matcher.is_blocked("foo.example.com"));
+    assert!(matcher.is_blocked("bar.baz.example.com"));
+    assert!(matcher.is_blocked("a.b.c.example.com"));
+  }
+
+  #[test]
+  fn test_blocklist_no_false_positives() {
+    let mut matcher = BlocklistMatcher::new();
+    let mut domains = HashSet::new();
+    domains.insert("example.com".to_string());
+    matcher.domains = Arc::new(domains);
+
+    // "notexample.com" should NOT match "example.com"
+    assert!(!matcher.is_blocked("notexample.com"));
+    assert!(!matcher.is_blocked("myexample.com"));
+    // But subdomain should
+    assert!(matcher.is_blocked("sub.example.com"));
+  }
+
+  #[test]
+  fn test_blocklist_empty_blocks_nothing() {
+    let matcher = BlocklistMatcher::new();
+    assert!(!matcher.is_blocked("anything.com"));
+    assert!(!matcher.is_blocked("example.com"));
+  }
+
+  #[test]
+  fn test_blocklist_case_insensitive() {
+    let mut matcher = BlocklistMatcher::new();
+    let mut domains = HashSet::new();
+    domains.insert("example.com".to_string());
+    matcher.domains = Arc::new(domains);
+
+    assert!(matcher.is_blocked("EXAMPLE.COM"));
+    assert!(matcher.is_blocked("Example.Com"));
+    assert!(matcher.is_blocked("FOO.EXAMPLE.COM"));
+  }
+
+  #[test]
+  fn test_blocklist_from_file() {
+    let mut tmpfile = tempfile::NamedTempFile::new().unwrap();
+    writeln!(tmpfile, "# This is a comment").unwrap();
+    writeln!(tmpfile).unwrap();
+    writeln!(tmpfile, "tracker.example.com").unwrap();
+    writeln!(tmpfile, "ads.network.com").unwrap();
+    writeln!(tmpfile, "# Another comment").unwrap();
+    writeln!(tmpfile, "malware.site").unwrap();
+    tmpfile.flush().unwrap();
+
+    let matcher = BlocklistMatcher::from_file(tmpfile.path().to_str().unwrap()).unwrap();
+
+    assert!(matcher.is_blocked("tracker.example.com"));
+    assert!(matcher.is_blocked("ads.network.com"));
+    assert!(matcher.is_blocked("malware.site"));
+    assert!(matcher.is_blocked("sub.malware.site"));
+    assert!(!matcher.is_blocked("safe.com"));
+    // Comments and empty lines should be skipped: 3 domains loaded
+    assert_eq!(matcher.domains.len(), 3);
+  }
+
+  #[test]
+  fn test_blocklist_comments_skipped() {
+    let mut tmpfile = tempfile::NamedTempFile::new().unwrap();
+    writeln!(tmpfile, "# Title: HaGeZi's Light DNS Blocklist").unwrap();
+    writeln!(tmpfile, "# Description: test").unwrap();
+    writeln!(tmpfile, "# Version: 2026.0330.0928.01").unwrap();
+    writeln!(tmpfile).unwrap();
+    writeln!(tmpfile, "domain1.com").unwrap();
+    writeln!(tmpfile, "domain2.com").unwrap();
+    tmpfile.flush().unwrap();
+
+    let matcher = BlocklistMatcher::from_file(tmpfile.path().to_str().unwrap()).unwrap();
+    assert_eq!(matcher.domains.len(), 2);
+    assert!(matcher.is_blocked("domain1.com"));
+    assert!(matcher.is_blocked("domain2.com"));
+  }
+}

src-tauri/src/proxy_storage.rs

@@ -14,6 +14,8 @@ pub struct ProxyConfig {
   pub profile_id: Option<String>,
   #[serde(default)]
   pub bypass_rules: Vec<String>,
+  #[serde(default)]
+  pub blocklist_file: Option<String>,
 }
 
 impl ProxyConfig {
@@ -27,6 +29,7 @@ impl ProxyConfig {
       pid: None,
       profile_id: None,
       bypass_rules: Vec::new(),
+      blocklist_file: None,
     }
   }
 
@@ -39,6 +42,11 @@ impl ProxyConfig {
     self.bypass_rules = bypass_rules;
     self
   }
+
+  pub fn with_blocklist_file(mut self, blocklist_file: Option<String>) -> Self {
+    self.blocklist_file = blocklist_file;
+    self
+  }
 }
 
 pub fn get_storage_dir() -> PathBuf {