Greasemonkey
Customize the way a web page displays or behaves, by using small bits of JavaScript.
197,737 users
Language: Indonesia (Indonesian)
Firefox Language Pack for Indonesia (id) – Indonesian
196,048 users
German Dictionary (Switzerland)
Dictionary with Swiss variants of German words for spellchecking in Firefox.
195,638 users
German Dictionary, extended for Austria
German dictionary ("new" orthography) for spellchecking in Firefox, extended with Austrian words
195,254 users
Language: Български (Bulgarian)
Firefox Language Pack for Български (bg) – Bulgarian
193,664 users
Language: Türkçe (Turkish)
Firefox Language Pack for Türkçe (tr) – Turkish
190,942 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
190,255 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.
189,635 users
Language: Slovenčina (Slovak)
Firefox Language Pack for Slovenčina (sk) – Slovak
187,645 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.
186,225 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.
181,134 users
Pinterest Save Button
Save your favorite ideas online so you can easily get back to them later.
178,505 users
Language: ไทย (Thai)
Firefox Language Pack for ไทย (th) – Thai
175,041 users
Language: Cрпски (Serbian)
Firefox Language Pack for Cрпски (sr) – Serbian
172,603 users
Language: Lietuvių (Lithuanian)
Firefox Language Pack for Lietuvių (lt) – Lithuanian
171,566 users
Language: עברית (Hebrew)
Firefox Language Pack for עברית (he) – Hebrew
171,513 users
Language: Slovenščina (Slovenian)
Firefox Language Pack for Slovenščina (sl) – Slovenian
171,024 users
171,003 users
Hoxx VPN Proxy
Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.
170,283 users
Language: فارسی (Persian)
Firefox Language Pack for فارسی (fa) – Persian
169,027 users
Language: Eesti (Estonian)
Firefox Language Pack for Eesti (et) – Estonian
167,043 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
166,749 users
164,406 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.
163,256 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.
162,773 users