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Add-ons, extensions, and themes

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

In English

Add-on Badges

Permission request messages for Firefox extensions

Understanding the risks of installing self-hosted extensions

Disable or remove Add-ons

Refresh Firefox - reset add-ons and settings

Multi-Account Containers

Extensions in Private Browsing

Filelink for Large Attachments

Personalized extension recommendations

Recommended Extensions program

Tips for assessing the safety of an extension

Manage your extensions using the extensions button in the toolbar

Find and install add-ons to add features to Firefox

An extension changed my New Tab page or home page

I found a fake Firefox update

Permission request messages for Thunderbird extensions

Use themes to change the look of Firefox

Manage optional permissions for Firefox extensions

Upgrade your graphics drivers to use hardware acceleration and WebGL

Open Search

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

Manage optional permissions for Firefox extensions on Android

Facebook Container - Prevent Facebook from tracking you on other websites

Use Firefox in another language

Cannot remove an add-on (extension or theme)

Add-on signing in Firefox

Firefox Translations Add-on

Unable to install add-ons (extensions or themes)

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

Thunderbird add-ons - frequently asked questions

Uninstall Firefox for Android extensions

Unified Toolbar

Installing the Pocket extension in your browser

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

Installing an Add-on in Thunderbird

Install themes to change the look of Thunderbird

Manage extension shortcuts in Firefox

How to add devices to your Mozilla VPN subscription

Recommended Firefox extensions for families and students

Using the Save to Pocket extension in Microsoft Edge

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

How to Customize the New Mail Sound

Why is there an OpenH264 plugin in Firefox?

Access your add-ons with a Mozilla account

Built-in themes in Firefox - alternative to complete themes

How to add the translate add-on to Firefox

Reporting extensions and themes for abuse

Block add-ons in Firefox for Enterprise

Site Permission Add-ons

Using the Save to Pocket extension for Google Chrome

Using the Save to Pocket extension for Safari

Troubleshooting Save Button issues with Pocket Chrome extension

Flash-based videos and sound do not play correctly

Certificates

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

Add-Ons FAQ

Add Search Engine to Open Search

How can I digitally sign and encrypt emails?

Installing and Using another Language in the Dictionary

How to Customize Toolbars

What is search hijacking?

How to update add-ons

How is Facebook Container different from Multi-account Containers?

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

Install system add-ons on 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)

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

userChrome.css and .js and userContent are unsupported

Using the Pocket Must Reads extension in Google Chrome

Using the Save to Pocket extension in Brave, Opera and Vivaldi

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