Add-ons, extensions, and themes

Enhance product functionality with add-ons, extensions, and themes.

Add-on Badges

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

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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.

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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.

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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.

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Recommended Extensions program

Learn how extensions make the cut for the Recommended Extensions program and where they can be found.

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Filelink for Large Attachments

Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.

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Multi-Account Containers

Add Container tabs to Firefox with the Multi-Account Containers add-on, to separate your work and personal browsing.

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Get started with the Mozilla VPN extension

The VPN extension complements the main VPN app, offering flexible controls to secure your browsing activity and customize VPN settings without altering your device-wide VPN protection.

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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.

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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.

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Installing an Add-on in Thunderbird

Add-ons add functionality to Thunderbird or change its appearance. Learn how to install add-ons to Thunderbird.

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Firefox Translations Add-on

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

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Install the Pocket extension in your browser

You can install the Save to Pocket extension for Google Chrome, Safari, Microsoft Edge and most Chromium-based browsers like Brave, Vivaldi, and Opera.

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Disable VPN protection for a specific website

The Mozilla VPN extension allows you to choose the websites you wish to protect and the ones you don't. This article describes how it works.

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How to Customize Toolbars

This article explains how to customize the position and contents of Thunderbird toolbars.

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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.

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Report 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.

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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.

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Change your location for a specific website

The Mozilla VPN extension allows you to set a particular location through which you want to access a given website. Learn about this feature here.

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Manage the VPN extension preferences

After configuring VPN preferences for different websites, you may want to review them to confirm they meet your expectations. Follow these steps to do so.

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How to update add-ons

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

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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.

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Change your theme in Firefox Focus for Android

Firefox Focus for Android has built-in light and dark themes so you can customize its appearance. You can also choose to have the theme follow your device theme.

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Change your theme in Firefox Focus for iOS

Firefox Focus for iOS has built-in light and dark themes so you can customize its appearance. You can also choose to have the theme set by your system.

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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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Install the Firefox Relay extension in Firefox for Android

Start generating email masks from your mobile device. This article provides step-by-step instructions for downloading and setting up the Relay extension in Firefox for Android.

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