Add-ons, extensions, and themes

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

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About Add-on Badges

Understanding the risks of installing self-hosted extensions

Extensions in Private Browsing

Disable or remove Add-ons

Personalized extension recommendations

Find and install add-ons to add features to Firefox

Recommended Extensions program

Manage optional permissions for Firefox extensions on Android

On-device AI models in Firefox

About permission request messages for Firefox extensions

Filelink for Large Attachments

JavaScript settings and preferences for interactive web pages

Add-on signing in Firefox

Multi-Account Containers

Permission request messages for Thunderbird extensions

Extension data collection

Use themes to change the look of Firefox

Get started with the Mozilla VPN extension

Tips for assessing the safety of an extension

Why does Mozilla disable some add-ons from running in Firefox?

Upgrade your graphics drivers to use hardware acceleration and WebGL

Cannot remove an add-on (extension or theme)

Thunderbird add-ons - frequently asked questions

An extension changed my New Tab page or home page

How to add devices to your Mozilla VPN subscription

Manage extension shortcuts in Firefox

Send plugin crash reports to help Mozilla improve Firefox

Uninstall Firefox for Android extensions

Disable Mozilla VPN protection for a specific website

Change your location for a specific website

Use Firefox in another language

Installing an Add-on in Thunderbird

How to update add-ons

Install the Firefox Relay extension on Firefox for desktop

Manage your extensions using the extensions button in the toolbar

Unable to install add-ons (extensions or themes)

Re-enable add-ons that were disabled when updating Firefox

How to Install and Use another Language in the Dictionary on Thunderbird

How to Customize Toolbars

Why is there an OpenH264 plugin in Firefox?

Access your add-ons with a Mozilla account

How to add the translate add-on to Firefox

Install themes to change the look of Thunderbird

Facebook Container - Prevent Facebook from tracking you on other websites

Manage optional permissions for Firefox extensions

Recommended Firefox extensions for families and students

Site Permission Add-ons

Install the Firefox Relay extension in Firefox for Android

What to do if another extension interferes with the Mozilla VPN extension

Harmful add-on protection

Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Flash-based videos and sound do not play correctly

Remove a toolbar that has taken over your Firefox search or home page

Certificates

Add-Ons FAQ

How can I digitally sign and encrypt emails?

Installing and Using another Language in the Dictionary

Get help with Firefox Developer Edition

What is search hijacking?

Why do Java, Silverlight, Adobe Acrobat and other plugins no longer work?

Built-in themes in Firefox - alternative to complete themes

Facebook Container isn't working

How is Facebook Container different from Multi-account Containers?

Report extensions and themes for abuse

Unable to install add-ons (extensions or themes) in Thunderbird

Install system add-ons on Firefox for Enterprise

Block add-ons in Firefox for Enterprise

Review installed extensions

Lightbeam extension for Firefox is no longer supported

Troubleshoot issues related to add-ons

Unable to uninstall add-ons (extensions or themes)

Change your theme in Firefox Focus for Android

Change your theme in Firefox Focus for iOS

Firefox Translations Add-on

X-Mouse Button Control in Firefox 110

Why aren’t my add-ons working on some websites?

Integrate Firefox Relay into the Firefox Password Manager

How will DNS work when using the VPN extension?

A program on your computer interferes with the Mozilla VPN extension

Manage the Mozilla VPN extension preferences

Orbit Frequently Asked Questions

Install the Thunderbird Pro Add-on in Thunderbird Desktop

Support for add-ons using Experiment APIs in Thunderbird

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