Greasemonkey
Customize the way a web page displays or behaves, by using small bits of JavaScript.
192,512 users
Browsing Protection by F-Secure
Extension for protecting encrypted browsing with security products by F-Secure.
186,906 users
Video Downloader professional
- download and save videos embedded into a website to your hard disk - add youtube, vimeo and other videos easily to your video list - supports up to 4k videos
186,714 users
React Developer Tools
React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more. To get started, just open the Firefox devtools and switch to the "⚛️ Components" or "⚛️ Profiler" tab.
185,167 users
Language: Türkçe (Turkish)
Firefox Language Pack for Türkçe (tr) – Turkish
182,944 users
Language: Български (Bulgarian)
Firefox Language Pack for Български (bg) – Bulgarian
181,346 users
Video Background Play Fix
Some sites may not work with Firefox for Android video background play feature. This add-on provides a quick fix by blocking the Page Visibility API and the Fullscreen API.
181,302 users
German Dictionary (Switzerland)
Dictionary with Swiss variants of German words for spellchecking in Firefox.
179,689 users
German Dictionary, extended for Austria
German dictionary ("new" orthography) for spellchecking in Firefox, extended with Austrian words
179,316 users
Avast Online Security & Privacy
Secure your Mozilla Firefox browser against real-time online threats, trackers, and scams. We’ll check every site you visit, from Facebook to your bank, so nothing puts you or your data at risk. Join a growing community of 400 million Avast users.
178,423 users
Language: Slovenčina (Slovak)
Firefox Language Pack for Slovenčina (sk) – Slovak
176,706 users
Pinterest Save Button
Save your favorite ideas online so you can easily get back to them later.
171,630 users
Language: ไทย (Thai)
Firefox Language Pack for ไทย (th) – Thai
167,333 users
Language: עברית (Hebrew)
Firefox Language Pack for עברית (he) – Hebrew
163,721 users
Hoxx VPN Proxy
Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.
163,433 users
162,672 users
YouTube High Definition
YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.
162,253 users
Language: Lietuvių (Lithuanian)
Firefox Language Pack for Lietuvių (lt) – Lithuanian
162,079 users
Maps Assist & Custom Web Search
Install the Maps Assist & Custom Web Search extension to get directions by clicking the favicon on the toolbar & enjoy Yahoo® search from your browser.
162,027 users
Language: Cрпски (Serbian)
Firefox Language Pack for Cрпски (sr) – Serbian
161,596 users
Language: Slovenščina (Slovenian)
Firefox Language Pack for Slovenščina (sl) – Slovenian
161,292 users
FireShot: Full Web Page Screenshots (♥♥♥♥♥)
FireShot makes full page screen captures - http://bit.ly/RlBQMV Screenshots are quickly captured and: ― Saved as Image / PDF with links and text ― Sent to clipboard ― Printed Capture all open tabs or provide a list of the URLs for grabbing
160,836 users
Language: فارسی (Persian)
Firefox Language Pack for فارسی (fa) – Persian
159,179 users
Language: Eesti (Estonian)
Firefox Language Pack for Eesti (et) – Estonian
158,058 users
156,417 users