Add explicit support for Firefox Android

package.json

@@ -53,6 +53,9 @@
     "browser_specific_settings": {
       "gecko": {
         "id": "{3fd86354-c73f-4395-9e26-2c5c984579bf}"
+      },
+      "gecko_android": {
+        "id": "{3fd86354-c73f-4395-9e26-2c5c984579bf}"
       }
     },
     "web_accessible_resources": [

src/components/SetupScreen.tsx

@@ -9,6 +9,7 @@ export function SetupScreen() {
   const open = useCallback(() => {
     const url = (chrome || browser).runtime.getURL(`/tabs/PermissionRequest.html`);
     (chrome || browser).tabs.create({ url });
+    window.close();
   }, []);
 
   return (