Greasemonkey
Customize the way a web page displays or behaves, by using small bits of JavaScript.
196,885 users
German Dictionary (Switzerland)
Dictionary with Swiss variants of German words for spellchecking in Firefox.
193,260 users
German Dictionary, extended for Austria
German dictionary ("new" orthography) for spellchecking in Firefox, extended with Austrian words
192,875 users
Language: Български (Bulgarian)
Firefox Language Pack for Български (bg) – Bulgarian
192,632 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
188,964 users
Language: Türkçe (Turkish)
Firefox Language Pack for Türkçe (tr) – Turkish
188,526 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.
187,455 users
Language: Indonesia (Indonesian)
Firefox Language Pack for Indonesia (id) – Indonesian
187,439 users
Language: Slovenčina (Slovak)
Firefox Language Pack for Slovenčina (sk) – Slovak
186,541 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.
184,725 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.
180,797 users
Pinterest Save Button
Save your favorite ideas online so you can easily get back to them later.
177,486 users
Language: ไทย (Thai)
Firefox Language Pack for ไทย (th) – Thai
173,851 users
Language: Cрпски (Serbian)
Firefox Language Pack for Cрпски (sr) – Serbian
171,794 users
Language: עברית (Hebrew)
Firefox Language Pack for עברית (he) – Hebrew
171,033 users
Language: Lietuvių (Lithuanian)
Firefox Language Pack for Lietuvių (lt) – Lithuanian
170,758 users
Language: Slovenščina (Slovenian)
Firefox Language Pack for Slovenščina (sl) – Slovenian
170,169 users
169,973 users
Hoxx VPN Proxy
Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.
167,324 users
Language: Eesti (Estonian)
Firefox Language Pack for Eesti (et) – Estonian
166,365 users
Language: فارسی (Persian)
Firefox Language Pack for فارسی (fa) – Persian
166,278 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
164,344 users
163,268 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.
162,895 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.
162,620 users