diff --git a/src-tauri/src/browser_runner.rs b/src-tauri/src/browser_runner.rs
index aab5ab3..4d92cfc 100644
--- a/src-tauri/src/browser_runner.rs
+++ b/src-tauri/src/browser_runner.rs
@@ -1,8 +1,10 @@
 use crate::proxy_manager::PROXY_MANAGER;
 use directories::BaseDirs;
 use serde::{Deserialize, Serialize};
+use std::collections::HashSet;
 use std::fs::{self, create_dir_all};
 use std::path::{Path, PathBuf};
+use std::sync::{Arc, Mutex};
 use std::time::{SystemTime, UNIX_EPOCH};
 use sysinfo::{Pid, System};
 use tauri::Emitter;
@@ -35,6 +37,11 @@ fn default_release_type() -> String {
   "stable".to_string()
 }
 
+// Global state to track currently downloading browsers
+lazy_static::lazy_static! {
+  static ref DOWNLOADING_BROWSERS: Arc<Mutex<HashSet<String>>> = Arc::new(Mutex::new(HashSet::new()));
+}
+
 // Platform-specific modules
 #[cfg(target_os = "macos")]
 mod macos {
@@ -2345,6 +2352,18 @@ impl BrowserRunner {
     browser_str: String,
     version: String,
   ) -> Result<String, Box<dyn std::error::Error + Send + Sync>> {
+    // Check if this browser type is already being downloaded
+    {
+      let mut downloading = DOWNLOADING_BROWSERS.lock().unwrap();
+      if downloading.contains(&browser_str) {
+        return Err(format!(
+          "Browser '{browser_str}' is already being downloaded. Please wait for the current download to complete."
+        ).into());
+      }
+      // Mark this browser as being downloaded
+      downloading.insert(browser_str.clone());
+    }
+
     let browser_type =
       BrowserType::from_str(&browser_str).map_err(|e| format!("Invalid browser type: {e}"))?;
     let browser = create_browser(browser_type.clone());
@@ -2428,6 +2447,11 @@ impl BrowserRunner {
         // Clean up failed download
         let _ = registry.cleanup_failed_download(&browser_str, &version);
         let _ = registry.save();
+        // Remove browser from downloading set on error
+        {
+          let mut downloading = DOWNLOADING_BROWSERS.lock().unwrap();
+          downloading.remove(&browser_str);
+        }
         return Err(format!("Failed to download browser: {e}").into());
       }
     };
@@ -2455,6 +2479,11 @@ impl BrowserRunner {
           // Clean up failed download
           let _ = registry.cleanup_failed_download(&browser_str, &version);
           let _ = registry.save();
+          // Remove browser from downloading set on error
+          {
+            let mut downloading = DOWNLOADING_BROWSERS.lock().unwrap();
+            downloading.remove(&browser_str);
+          }
           return Err(format!("Failed to extract browser: {e}").into());
         }
       }
@@ -2484,6 +2513,11 @@ impl BrowserRunner {
     if !browser.is_version_downloaded(&version, &binaries_dir) {
       let _ = registry.cleanup_failed_download(&browser_str, &version);
       let _ = registry.save();
+      // Remove browser from downloading set on verification failure
+      {
+        let mut downloading = DOWNLOADING_BROWSERS.lock().unwrap();
+        downloading.remove(&browser_str);
+      }
       return Err("Browser download completed but verification failed".into());
     }
 
@@ -2514,6 +2548,12 @@ impl BrowserRunner {
     };
     let _ = app_handle.emit("download-progress", &progress);
 
+    // Remove browser from downloading set
+    {
+      let mut downloading = DOWNLOADING_BROWSERS.lock().unwrap();
+      downloading.remove(&browser_str);
+    }
+
     Ok(version)
   }
 
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 929b09d..93e20cc 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -27,9 +27,9 @@ export default function RootLayout({
         className={`${geistSans.variable} ${geistMono.variable} antialiased`}
       >
         <CustomThemeProvider>
-          <WindowDragArea />
           <TooltipProvider>{children}</TooltipProvider>
           <Toaster />
+          <WindowDragArea />
         </CustomThemeProvider>
       </body>
     </html>
diff --git a/src/app/page.tsx b/src/app/page.tsx
index ef4d7d9..2bd1d5e 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -79,17 +79,27 @@ export default function Home() {
       if (missingBinaries.length > 0) {
         console.log("Found missing binaries:", missingBinaries);
 
+        // Group missing binaries by browser type to avoid concurrent downloads
+        const browserMap = new Map<string, string[]>();
+        for (const [profileName, browser, version] of missingBinaries) {
+          if (!browserMap.has(browser)) {
+            browserMap.set(browser, []);
+          }
+          const versions = browserMap.get(browser);
+          if (versions) {
+            versions.push(`${version} (for ${profileName})`);
+          }
+        }
+
         // Show a toast notification about missing binaries and auto-download them
-        const missingList = missingBinaries
-          .map(
-            ([profileName, browser, version]) =>
-              `${browser} ${version} (for ${profileName})`,
-          )
+        const missingList = Array.from(browserMap.entries())
+          .map(([browser, versions]) => `${browser}: ${versions.join(", ")}`)
           .join(", ");
 
         console.log(`Downloading missing binaries: ${missingList}`);
 
         try {
+          // Download missing binaries sequentially by browser type to prevent conflicts
           const downloaded = await invoke<string[]>(
             "ensure_all_binaries_exist",
           );
diff --git a/src/components/window-drag-area.tsx b/src/components/window-drag-area.tsx
index c6e8c9c..0eee23e 100644
--- a/src/components/window-drag-area.tsx
+++ b/src/components/window-drag-area.tsx
@@ -41,7 +41,7 @@ export function WindowDragArea() {
   return (
     <button
       type="button"
-      className="fixed top-0 right-0 left-0 h-10 bg-transparent border-0 pointer-events-none z-9999"
+      className="fixed top-0 right-0 left-0 h-10 bg-transparent border-0 z-9999"
       style={{
         // Ensure it's above all other content
         zIndex: 9999,
diff --git a/src/hooks/use-browser-download.ts b/src/hooks/use-browser-download.ts
index 5bba2a7..240ca77 100644
--- a/src/hooks/use-browser-download.ts
+++ b/src/hooks/use-browser-download.ts
@@ -48,7 +48,9 @@ export function useBrowserDownload() {
     [],
   );
   const [downloadedVersions, setDownloadedVersions] = useState<string[]>([]);
-  const [isDownloading, setIsDownloading] = useState(false);
+  const [downloadingBrowsers, setDownloadingBrowsers] = useState<Set<string>>(
+    new Set(),
+  );
   const [downloadProgress, setDownloadProgress] =
     useState<DownloadProgress | null>(null);
 
@@ -181,7 +183,7 @@ export function useBrowserDownload() {
       suppressNotifications = false,
     ) => {
       const browserName = getBrowserDisplayName(browserStr);
-      setIsDownloading(true);
+      setDownloadingBrowsers((prev) => new Set(prev).add(browserStr));
 
       try {
         // Check browser compatibility before attempting download
@@ -215,7 +217,11 @@ export function useBrowserDownload() {
         }
         throw error;
       } finally {
-        setIsDownloading(false);
+        setDownloadingBrowsers((prev) => {
+          const next = new Set(prev);
+          next.delete(browserStr);
+          return next;
+        });
       }
     },
     [loadDownloadedVersions],
@@ -228,6 +234,17 @@ export function useBrowserDownload() {
     [downloadedVersions],
   );
 
+  // Check if a browser type is currently downloading
+  const isBrowserDownloading = useCallback(
+    (browserStr: string) => {
+      return downloadingBrowsers.has(browserStr);
+    },
+    [downloadingBrowsers],
+  );
+
+  // Legacy isDownloading for backwards compatibility
+  const isDownloading = downloadingBrowsers.size > 0;
+
   // Listen for download progress events
   useEffect(() => {
     const unlisten = listen<DownloadProgress>("download-progress", (event) => {
@@ -272,6 +289,8 @@ export function useBrowserDownload() {
     availableVersions,
     downloadedVersions,
     isDownloading,
+    isBrowserDownloading,
+    downloadingBrowsers,
     downloadProgress,
     loadVersions,
     loadVersionsWithNewCount,
diff --git a/src/hooks/use-update-notifications.tsx b/src/hooks/use-update-notifications.tsx
index 77b68a1..8d0981e 100644
--- a/src/hooks/use-update-notifications.tsx
+++ b/src/hooks/use-update-notifications.tsx
@@ -32,22 +32,21 @@ export function useUpdateNotifications(
 
   // Add refs to track ongoing operations to prevent duplicates
   const isCheckingForUpdates = useRef(false);
-  const activeDownloads = useRef<Set<string>>(new Set()); // Track "browser-version" keys
+  // Track browser types being downloaded (not browser-version pairs)
+  const activeDownloads = useRef<Set<string>>(new Set()); // Track browser types
 
   const handleAutoUpdate = useCallback(
     async (browser: string, newVersion: string, notificationId: string) => {
-      const downloadKey = `${browser}-${newVersion}`;
-
-      // Check if this download is already in progress
-      if (activeDownloads.current.has(downloadKey)) {
+      // Check if this browser type is already being downloaded
+      if (activeDownloads.current.has(browser)) {
         console.log(
-          `Download already in progress for ${downloadKey}, skipping duplicate`,
+          `Download already in progress for browser type ${browser}, skipping duplicate auto-update`,
         );
         return;
       }
 
-      // Mark download as active and disable browser
-      activeDownloads.current.add(downloadKey);
+      // Mark browser type as active and disable browser
+      activeDownloads.current.add(browser);
       setUpdatingBrowsers((prev) => new Set(prev).add(browser));
 
       try {
@@ -158,8 +157,8 @@ export function useUpdateNotifications(
         console.error("Failed to start auto-update:", error);
         throw error;
       } finally {
-        // Clean up
-        activeDownloads.current.delete(downloadKey);
+        // Clean up - remove browser type from active downloads
+        activeDownloads.current.delete(browser);
         setUpdatingBrowsers((prev) => {
           const next = new Set(prev);
           next.delete(browser);