Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.

Download Firefox Extensions to add features that customize browsing. Protect passwords, find deals, enhance video, and block annoying ads with browser apps.

Download themes to change how Firefox looks. Tailor your experience to your tastes. Cute critters, evil robots, beautiful landscapes—thousands of options.

Firefox Add-ons Blog Extension Workshop Developer Hub Developer Policies Community Blog Forum Report a bug Review Guide Browsers Desktop Mobile Enterprise Products Browsers …

The official Mozilla site for downloading Firefox extensions and themes. Add new features and change the browser’s appearance to customize your web experience.

Nov 25, 2025 · Download Video DownloadHelper for Firefox. Download videos from the web. Easy, smart, no tracking.

Nov 26, 2025 · Download uBlock Origin for Firefox. Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

Dec 2, 2025 · Download Adblock Plus for Firefox. One of the most popular free ad blockers for Firefox. Block annoying ads on sites like Facebook, YouTube and all other websites. Adblock …

Customize Firefox Whether you’re new to extension development, polishing up or porting an existing extension or theme, or creating a custom enterprise solution, we’ve got the resources …

Jun 30, 2025 · Read Aloud is a Firefox extension that uses text-to-speech technology to convert webpage text to audio. It works on a variety of websites, including news sites, blogs, fan …