Enhance Firefox's functionality and appearance with add-ons
- Firefox add-on technology is modernizing Add-ons have been updated to make Quantum awesome. Here's what's changing for Firefox 57 and beyond.
- 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.
- Permission request messages for Firefox extensions More information about each permission request you may encounter when installing an extension into Firefox.
- Use themes to change the look of Firefox 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.
- Disable or remove Add-ons Extensions, themes, and plugins are all types of add-ons for Firefox. This article describes how to disable and remove add-ons in Firefox.
- Find and install add-ons to add features to Firefox Extend Firefox with add-ons to add new features to it. We'll cover the different types available and how to find and install them.
- Frequently asked questions - Firefox add-on technology is modernizing Add-ons have experienced big changes in Firefox 57+ (aka Firefox Quantum). Check out these frequently asked questions for more information.