For bugs in Firefox Desktop, the Mozilla Foundation's web browser. For Firefox user interface issues in menus, developer tools, bookmarks, location bar, and preferences. Many Firefox bugs will either be filed here or in the Core 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

Bookmarks & History

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

Build Config

For bugs and feature requests in the Firefox build and configuration setup. More info: Build Config module description.

Developer Tools

For bugs relating to developer tools within the Firefox web browser (devtools). This includes developer-related APIs and front-end features.

Developer Tools: about:debugging

Bugs related to the about:debugging page.

Developer Tools: Animation Inspector

For issues relating to the Animation Inspector within Firefox Developer Tools.

Developer Tools: Canvas Debugger

Bugs and issues with the WebGL and 2D canvas context debugger within Firefox developer tools.

Developer Tools: Computed Styles Inspector

For issues relating to the Computed Styles Inspector within Firefox Developer Tools.

Developer Tools: Console

For issues with the Web Console, Graphical Command Line (GCLI), console object, etc within Firefox developer tools

Developer Tools: CSS Rules Inspector

For issues relating to the CSS Rules Inspector within Firefox Developer Tools.

Developer Tools: Debugger

Issues related to the debugger should be filed in Any issues filed in bugzilla for the debugger will eventually be tracked in GitHub.

Developer Tools: DOM

The DOM panel in Firefox DevTools which shows the DOM properties, functions, etc. in the current environment.

Developer Tools: Font Inspector

For issues relating to the Font Inspector within Firefox Developer Tools.

Developer Tools: Framework

Bugs pertaining to the Developer Tools Toolbox and remote connection mechanisms.

Developer Tools: Graphic Commandline and Toolbar

The Graphic Command line and Global Developer Toolbar.

Developer Tools: Inspector

For issues with the Highlighter, Rule Inspector, Style Inspector and HTML view within Firefox developer tools

Developer Tools: JSON Viewer

File bugs here for Firefox's built-in JSON Viewer.

Developer Tools: Measuring Tool

For issues related to the Measuring Tool and Page Rulers within Firefox Developer Tools

Developer Tools: Memory

Bugs relating to the Firefox Memory Developer Tool.

Developer Tools: Netmonitor

The Netmonitor is the network logging feature in the Firefox Developer Tools.

Developer Tools: Object Inspector

For issues with object inspection within Firefox developer tools

Developer Tools: Performance Tools (Profiler/Timeline)

The Built-in JavaScript profiler.

Developer Tools: Responsive Design Mode

The Responsive Design Mode developer tool, which supports testing content at various screen sizes, pixel ratios, etc.

Developer Tools: Scratchpad

For issues with the JavaScript Scratchpad feature of Firefox developer tools

Developer Tools: Shared Components

A place to work on shared React components (and other UI utilities) that will be used across the Developer Tools

Developer Tools: Source Editor

This component is responsible for the code editor and wraps the Orion editor in an API.

Developer Tools: Storage Inspector

Issues with the Storage Inspector (Cookies, IndexDB, localStorage, etc)

Developer Tools: Style Editor

For issues with the Style Editor within Firefox developer tools

Developer Tools: Web Audio Editor

Component for the Web Audio Editor within Firefox Developer Tools

Developer Tools: WebGL Shader Editor

Bugs and issues with WebGL shader editor for GLSL code within Firefox developer tools.

Developer Tools: WebIDE

Bugs related to the WebIDE tool for developing and debugging apps and web sites.

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 compliance bugs in Firefox: screen readers, magnifier tools support, user interface bugs affecting on disabled people experience.


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.

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.


Bugs found through the FFx 57 foxfooding program will be filed in this component to be triaged to the appropriate buckets.


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.

Location Bar

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


Firefox Profile Migration from other browsers.

New Tab Page

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

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.

RSS Discovery and Preview

Bugs in Firefox's discovery of RSS feeds and inline preview. This is separate from live bookmarks.

Screen Sharing Whitelist

A white list that folks need to apply to access to allow their sites to use screen sharing (more info).


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

Areas where Firefox integrates with the host desktop environment. Please use the "Theme" component for any Theme-related issues. Please use the "Core" product for other OS integration problems.

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.