Greasemonkey
Customize the way a web page displays or behaves, by using small bits of JavaScript.
195,951 users
Language: Български (Bulgarian)
Firefox Language Pack for Български (bg) – Bulgarian
191,528 users
German Dictionary (Switzerland)
Dictionary with Swiss variants of German words for spellchecking in Firefox.
189,240 users
German Dictionary, extended for Austria
German dictionary ("new" orthography) for spellchecking in Firefox, extended with Austrian words
188,894 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
187,489 users
Language: Slovenčina (Slovak)
Firefox Language Pack for Slovenčina (sk) – Slovak
185,504 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.
185,428 users
Language: Türkçe (Turkish)
Firefox Language Pack for Türkçe (tr) – Turkish
185,271 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.
183,594 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.
180,725 users
Pinterest Save Button
Save your favorite ideas online so you can easily get back to them later.
176,900 users
Language: Indonesia (Indonesian)
Firefox Language Pack for Indonesia (id) – Indonesian
176,134 users
Language: ไทย (Thai)
Firefox Language Pack for ไทย (th) – Thai
173,122 users
Language: עברית (Hebrew)
Firefox Language Pack for עברית (he) – Hebrew
171,112 users
Language: Cрпски (Serbian)
Firefox Language Pack for Cрпски (sr) – Serbian
171,094 users
Language: Lietuvių (Lithuanian)
Firefox Language Pack for Lietuvių (lt) – Lithuanian
170,046 users
169,793 users
Language: Slovenščina (Slovenian)
Firefox Language Pack for Slovenščina (sl) – Slovenian
169,402 users
Language: Eesti (Estonian)
Firefox Language Pack for Eesti (et) – Estonian
165,905 users
Hoxx VPN Proxy
Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.
165,115 users
Language: فارسی (Persian)
Firefox Language Pack for فارسی (fa) – Persian
164,696 users
162,873 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.
162,775 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.
162,450 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
162,043 users