Firefox isn’t the most popular browser in the world — that honor now goes to Google Chrome — but it still has an ardent following. And after slipping in recent years, it has been on something of a rebound of late, too, gaining 4.6 percentage points in global market share since last August and ending July at a three-year high of 12.3%. (It’s available for download if you haven’t tried it yet, and want to.)

While Firefox is a well-rounded browser in its own right, its capabilities can be expanded by installing any of a wealth of extensions that can boost performance and improve users’ workflow. We scoured Firefox's repository for add-ons and selected those with the most users and top reviews. These are 12 of the best Firefox add-ons you can use to turn Firefox into a powerhouse.

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