Add-ons allow you to customize Firefox to your liking by either improving your browsing experience in an infinite number of ways or changing the appearance of your browser such as how you would change the background picture of your desktop. We'll show you the various ways you can get and install add-ons to Firefox.
Browsing for add-ons is a great way to discover ones you never knew you needed.
Click the menu button
and choose Add-ons. The Add-ons Manager tab will open.
In the Add-ons Manager tab, select the Get Add-ons panel.
From this tab, you will see Featured Add-ons as well as Featured Themes that have been chosen by the Mozilla community due to their usefulness and quality. Clicking on any of them will allow you to view pictures as well as user reviews to get a better idea of how they might work for you. You can also use the search bar on the top-right corner to find additional add-ons.