Issues with the Firefox Lockwise 'Logins and Passwords' management page. Issues with filling and saving passwords on websites belong in Toolkit::Password Manager.

General Activity Streams bugs

Bugs for server infrastructure supporting our application servers for activity streams

Bugs for the Timeline page activity streams implementation

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

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

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)

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

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.

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.

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.

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

Bugs related to the Firefox Monitor (a.k.a Breach Alerts) feature within the Firefox UI. For issues with the website, please file an issue on GitHub.

Bugs relating to the Firefox View page, toolbar button and integration

Bugs found through the foxfooding program will be filed in this component to be later 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.

Keyboard shortcut navigation in Firefox's user interface

Bugs relating to the Launcher Process for Windows builds

Bugs and feature requests for Firefox menus. This includes toplevel and context menus.

For bugs that involve user interrupting messages, badging and notifications in Firefox. This includes Contextual Feature Recommender (CFR), Onboarding Tour, Feature Callouts, Menu/Toolbar badges and door-hangers.

Firefox Profile Migration from other browsers.

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

All bugs related to Nimbus experimentation client code in Firefox Desktop

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

Web service to store and serve recipes

For issues with the Page Info window.

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

Pioneer is a data donation and sharing platform.

Bugs involving the integration with Pocket and Firefox.

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

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

Bugs and feature requests for Firefox Screenshots

Web search UI, default search engines and Toolkit's search service. Find-in-page bugs belong in Toolkit::Find Toolbar instead.

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.

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

Bugs and feature requests for Firefox Settings. This is specific to the Tools->Settings UI - for issues with other types of settings (e.g. permissions, settings internal to websites, OS settings, ...), requests to change default settings values, bugs where internal values of settings have no effect, etc., file bugs in components related to those features/settings instead.

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

Bugs and feature requests for Firefox Shopping

For bugs and feature requests in the UI that signals site identity and connection security, such as the lock icon and the corresponding “identity panel”.

Bugs and feature requests for the Firefox UI to give or revoke web page permissions to access device functionality such as camera, microphone, geolocation or notifications.

Bugs and feature requests for Sync in Firefox Desktop.

Requests to ship a system add-on off-train through Go Faster (Balrog) (more info).

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.

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

Bugs related to top sites on the new tab page and in the address bar

UITour, firstrun and whatsnew Firefox bugs.

Instant translation and language detection in Firefox.

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

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