Manage preferences and add-ons
Manage add-ons
Enhance Firefox's functionality and appearance with add-ons
Permission request messages for Firefox extensions
More information about each permission request you may encounter when installing an extension into Firefox.
Extensions in Private Browsing
You can set which Firefox extensions can run in private windows and which can't, when you install the extension or later on. Learn more.
Find and install add-ons to add features to Firefox
Extend Firefox with add-ons to add new features. Learn about the different types available and how to find and install them.
Recommended Extensions program
Learn how extensions make the cut for the Recommended Extensions program and where they can be found.
Add-on signing in Firefox
Learn about add-on signing and what to do if an extension you want to use could not be verified for use in Firefox.
Use themes to change the look of Firefox
A theme is a type of add-on which changes the visual appearance of Firefox. Learn how to find, install, and manage themes in Firefox.
Disable or remove Add-ons
Extensions, themes and plugins are all types of add-ons for Firefox. This article describes how to disable and remove add-ons in Firefox.
Lightbeam extension for Firefox is no longer supported
Mozilla ended official support of the Lightbeam extension in October 2019 and has no plans to resume maintenance of it in the future.
Extensions Disabled by Mozilla in October 2019
Extensions removed in October 2019.
Reporting extensions and themes for abuse
Discover what constitutes inappropriate content or behavior in an extension or theme, and see how to report any abuse you find.
Understanding the risks of installing self-hosted extensions
Learn about the risks of installing extensions from third-parties and how to assess the trustworthiness of the source.
Troubleshoot issues related to add-ons
Add-ons can cause issues in Firefox. This article provides more information on how you can troubleshoot Firefox issues related to add-ons.
Firefox add-on technology is modernizing
Add-ons have been updated to a new standard in Firefox version 57 and above. Learn more about this change in Firefox extensions.
Frequently asked questions - Firefox add-on technology is modernizing
Add-ons have undergone big changes in Firefox 57 and above. This article answers frequently asked questions about changes to extensions.
