For bugs in Firefox Desktop, the Mozilla Foundation's web browser. For Firefox user interface issues in menus, bookmarks, location bar, and preferences. Many Firefox bugs will either be filed here or in the Core product. Bugs for developer tools (F12) should be filed in the DevTools product. (more info)

Select a component to see open bugs in that component:

Activity Streams: Application Servers

Bugs for the development of our application servers for activity streams including our metrics collection front-ends (onyx), our content management system (splice) and our data processing rules (infernyx)

Activity Streams: General

General Activity Streams bugs

Activity Streams: Newtab

Bugs for the newtab page activity streams implementation

Activity Streams: Server Operations

Bugs for server infrastructure supporting our application servers for activity streams

Activity Streams: Timeline

Bugs for the Timeline page activity streams implementation

Address Bar

For bugs in the Firefox "Smart Location Bar" UI element, including the bookmark and history autocomplete matching behavior.

Bookmarks & History

Bugs and feature requests for Firefox bookmarks & history. This includes the bookmarks menu, add and modify bookmarks dialogs and the bookmarks manager.

Device Permissions

Bugs and feature requests for the Firefox UI to give or revoke web page permissions to access devices (camera, microphone, screen share, …).

Disability Access

Accessibility-related bugs in Firefox: screen readers, support for magnifier tools, user interface bugs affecting the experience of people with disabilities, compliance with national and international accessibility standards.


Bugs related to the creation of desktop distributions (distribution.ini)

Downloads Panel

For issues with the Downloads Panel, the new download manager of Firefox that lives in the navigation toolbar.

Enterprise Policies

Bugs and feature requests related to specific policies implemented in Firefox, or to the policy engine itself. Bugs about Group Policy Object (GPO) should be reported in this component.

Extension Compatibility

Version level or extension problems or Gecko problems that cause extensions not to work. Also home to INVALID bugs where a malfunctioning extension has broken Firefox.

File Handling

For issues dealing with helper applications, and guessing Content Types when they aren't specified/known (ftp:, file:, jar:, but generally not http:). This component does not cover: backend networking issues, such as those covered by Networking: FTP or Networking: File, nor does it cover the Download Manager which has its own component in the Toolkit product.

Firefox Accounts

For bugs in shared services/fxaccounts code related to Firefox accounts

Firefox Monitor

Bugs related to the Firefox Monitor (a.k.a Breach Alerts) feature


For bugs in Firefox which do not fit into other more specific Firefox components


For bugs related to headless browsing mode where Firefox is a web browser without a Graphical User Interface (GUI).


Bugs and feature requests for the Firefox application install wizard.


Firefox Profile Migration from other browsers.

New Tab Page

The page displayed when a new tab is opened (about:newtab).

Normandy Client

In-browser component that validates and executes actions in a sandbox

Normandy Server

Web service to store and serve recipes

Page Info Window

For issues with the Page Info window.

PDF Viewer

For bugs related to Firefox's built-in PDF viewing capabilities (also known as pdf.js).


Bugs involving the integration with Pocket and Firefox.


Bugs and feature requests for Firefox preferences. This includes the Tools->Options UI as well as the preference defaults.

Private Browsing

For bugs and feature requests in Firefox's Private Browsing implementation.

Remote Settings Client

Module in charge of fetching and keeping remote settings in sync with Mozilla servers.


For Firefox Screenshots system add-on bugs related to security and release tracking. Please file other bugs under Non-security or release management bugs filed here will be closed as incomplete and moved to GitHub Issues


For app-level security bugs.

If the problem relates to underlying components (PSM, NSS, Core, Toolkit) then please file it in the appropriate product instead of here.

Security: Review Requests

Task queue for the Platform Integrity Security Team

Session Restore

For bugs in Firefox's session restore functionality, including the undo close tab feature.

Shell Integration

This component is responsible for determining if Firefox is the default browser, setting Firefox as the default browser, and setting the desktop background.

Site Identity and Permission Panels

For issues relating to the site identity block in the location bar, site information panel (also known as "Control Center"), and prompts from sites that require additional permissions (such as geolocation, camera, and microphone).


Social has become an integral part of the Web experience, and that's driving the need for social touch points in the browser. This component covers all pieces of UI and platform work to integrate the social experience into Firefox.

SocialAPI: Providers

This component is used to track bugs in code from third-party social providers that use the Social API. For bugs in Firefox's implementation of the Social API, use Firefox::SocialAPI.


Contains bugs related to Firefox accounts-based Sync UI. Bugs in the Sync back-ends should be tracked in Cloud Services::Firefox: Sync Back-end

Tabbed Browser

For problems in the browser tab features or problems with the widget itself.


General user interface, user experience, and visual design for the default theme used in Firefox.

Toolbars and Customization

Bugs and feature requests for Firefox toolbars. This includes toolbar customization.


UITour, firstrun and whatsnew Firefox bugs.

Tracking Protection

For bugs and feature requests in Firefox's Tracking Protection feature.


Instant translation and language detection in Firefox.


For newly filed bugs that need some help finding the right place to go.

WebPayments UI

User Interface for the WebPayments Payment Request API and Payment Handler API.