Greasemonkey
Customize the way a web page displays or behaves, by using small bits of JavaScript.
197,194 users
German Dictionary (Switzerland)
Dictionary with Swiss variants of German words for spellchecking in Firefox.
193,929 users
German Dictionary, extended for Austria
German dictionary ("new" orthography) for spellchecking in Firefox, extended with Austrian words
193,552 users
Language: Български (Bulgarian)
Firefox Language Pack for Български (bg) – Bulgarian
193,053 users
Language: Indonesia (Indonesian)
Firefox Language Pack for Indonesia (id) – Indonesian
191,828 users
Language: Türkçe (Turkish)
Firefox Language Pack for Türkçe (tr) – Turkish
189,459 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
189,454 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.
188,459 users
Language: Slovenčina (Slovak)
Firefox Language Pack for Slovenčina (sk) – Slovak
186,892 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.
185,211 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.
180,904 users
Pinterest Save Button
Save your favorite ideas online so you can easily get back to them later.
177,766 users
Language: ไทย (Thai)
Firefox Language Pack for ไทย (th) – Thai
174,219 users
Language: Cрпски (Serbian)
Firefox Language Pack for Cрпски (sr) – Serbian
172,094 users
Language: Lietuvių (Lithuanian)
Firefox Language Pack for Lietuvių (lt) – Lithuanian
171,047 users
Language: עברית (Hebrew)
Firefox Language Pack for עברית (he) – Hebrew
170,969 users
Language: Slovenščina (Slovenian)
Firefox Language Pack for Slovenščina (sl) – Slovenian
170,487 users
170,339 users
Hoxx VPN Proxy
Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.
168,717 users
Language: فارسی (Persian)
Firefox Language Pack for فارسی (fa) – Persian
167,612 users
Language: Eesti (Estonian)
Firefox Language Pack for Eesti (et) – Estonian
166,606 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
165,380 users
163,655 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.
163,001 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.
162,571 users