Install and manage add-ons
Add-ons let you customize and add features to Firefox.
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.
Add-on Badges
You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.
Permission request messages for Firefox extensions
More information about each permission request you may encounter when installing an extension into Firefox.
Tips for assessing the safety of an extension
Here are a few tips for assessing the safety of a third party extension.
Personalized extension recommendations
Learn more about how Firefox occasionally recommends extensions you may find interesting and how to opt-out.
Manage your extensions using the extensions button in the toolbar
This article describes the new extensions button and how to manage your extensions and their permissions directly from the Firefox toolbar.
Refresh Firefox - reset add-ons and settings
A Refresh can fix many issues by restoring Firefox to its default state while saving essential information like bookmarks and passwords.
Disable or remove Add-ons
Extensions and themes are types of add-ons for Firefox. This article describes how to disable and remove add-ons in Firefox.
Find and install add-ons to add features to Firefox
You can install different types of add-ons, such as extensions to add features to Firefox and themes to change its appearance. Learn more.
An extension changed my New Tab page or home page
View and disable extensions or add-ons that change the new tab page or home page.
Recommended Extensions program
Learn how extensions make the cut for the Recommended Extensions program and where they can be found.
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.
Multi-Account Containers
Add Container tabs to Firefox with the Multi-Account Containers add-on, to separate your work and personal browsing.
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 that changes the visual appearance of Firefox. Learn how to find, install, and manage themes in Firefox.
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.
Built-in themes in Firefox - alternative to complete themes
How to enable Firefox's built-in themes.
Facebook Container - Prevent Facebook from tracking you on other websites
Facebook Container is an add-on that you can install on Firefox to prevent Facebook from tracking your activity on other websites.
Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
Learn how to find out if an extension, theme or hardware acceleration is causing a Firefox problem and what steps you can take to fix it.
Cannot remove an add-on (extension or theme)
This article describes how to uninstall an extension or theme that can't be removed normally. This includes problematic toolbars and search bars.
Manage Optional Permissions for Extensions
Learn how you can manage optional permissions for extensions in the Firefox Add-ons Manager.
Unable to install add-ons (extensions or themes)
This article describes various reasons that would cause an add-on not to be able to be installed and what you can do to fix the issue.
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.
How to update add-ons
This article explains how to update your Firefox add-ons from the Extensions panel in the Add-ons Manager.
Manage extension shortcuts in Firefox
Manage your add-on shortcuts through the Manage Preferences menu in about:addons.
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.
Recommended Firefox extensions for families and students
This article lists some extensions for parents and students that you can add to Firefox, to enhance browsing and help you stay productive.
Re-enable add-ons that were disabled when updating Firefox
Many add-ons are automatically compatible with the latest Firefox. For those that aren't, we'll show you how to search for new versions or find an alternative.
Access your add-ons with a Mozilla account
The addons.mozilla.org (AMO) site is using Mozilla accounts to offer a more integrated experience across all Mozilla services and products.
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.
How is Facebook Container different from Multi-account Containers?
The difference between Facebook Container and Multi-Account Containers
Review installed extensions
Reviewing the extensions you have installed periodically can make it harder for malicious extensions to put your security and privacy at risk.
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.
Site Permission Add-ons
Sites can ask to install permission add-ons that modify Firefox’s default security behavior to give them extra privileges. Learn more.
