Install and manage add-ons

Add-ons let you customize and add features to Firefox.

Add-on Badges

You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.

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.

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.

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.

How to update add-ons

This article explains how to update your Firefox add-ons from the Extensions panel in the Add-ons Manager.

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.

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.

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