Customize controls, options and add-ons

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.

Extensions and themes are types of add-ons for Firefox. This article describes how to disable and remove add-ons in Firefox.

Facebook Container is an add-on that you can install on Firefox to prevent Facebook from tracking your activity on other websites.

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.

How to display Firefox in a different language.

Since the release of Firefox version 52 in March 2017, NPAPI plugins no longer load, except for Adobe Flash. Learn more about this change.

Translate web pages in Firefox when you visit a site that's in another language, without using the cloud.

Firefox comes with the OpenH264 add-on to support WebRTC or video communication.

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

Learn how you can manage optional permissions for extensions in the Firefox Add-ons Manager.

This article describes how to add a page translator feature to Firefox with add-ons.

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Reviewing the extensions you have installed periodically can make it harder for malicious extensions to put your security and privacy at risk.