Firefox Add-ons Installation Guide

Forefox logo and a puzzle piece

Ken Saunders avatar by Ken Saunders

Installing Firefox Add-ons

Installing Firefox Add-ons is quite easy. Simply follow the steps below and in no time you'll be using your new extensions and themes.

Also see, Manually Install a Firefox Add-on.
Learn how to install a Firefox add-on from a downloaded extension or theme file.

First, go to the Firefox Add-ons site and select the extension or theme that you would like to install.

Screen shot of the Firefox add-ons site

Click on the Add to Firefox button and the Software Installation window will appear after the add-on has been downloaded.

Green web button

Firefox 4 download progress meter

 Firefox add-ons installation window 1

After a brief countdown (takes about 2 seconds), the Install Now button will be active.
Click on Install Now.

Some add-ons (restartless ones), do not require restarting Firefox after installation.
For those, a small popup may appear notifying you that the add-on has been installed successfully.

 Firefox add-ons installation window 3a

For other add-ons, when the installation has completed, select Restart Now.

 Firefox add-ons installation window 3

Add-on Options
Once Firefox restarts you will now be able to use your add-on.
Many add-ons provide new interface objects such as buttons, toolbars and various options.
See the Firefox Add-on Options page for more information.

Firefox Add-ons Manager

Customizing Firefox
Customizing Toolbars