Privacy Possum
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
72,211 users
Plasma Integration
Multitask efficiently by controlling browser functions from the Plasma desktop.
69,057 users
User-Agent Switcher
Easily override the browser's User-Agent string
66,472 users
Cookie Quick Manager
An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
64,194 users
Popup Blocker Ultimate
Best Pop-up Blocker for Firefox. (Best in Rating, Performance, This addon does NOT collect user's data same as Poper Blocker)If your Firefox version is not 57+ please install version 8.1 from Official website.
62,010 users
Task Manager Tab & Custom Web Search
Add the Task Manager Tab & Custom Web Search extension and get productivity-enhancing tools online by clicking the favicon on the toolbar & enjoy access to Yahoo® search from your browser search bar.
59,629 users
Quick Live News & Custom Web Search
Install the Quick Live News & Custom Web Search extension and click the icon on the toolbar to access top news stories & customized web search from your browser
56,202 users
Adblock for Youtube™
Popular Adblock for Youtube™ Extension: Removes the video ads from Youtube™. Thanks to all AdBlock supporters!
49,766 users
BTRoblox - Making Roblox Better
BTRoblox, or Better Roblox, is an extension that aims to enhance Roblox's website by modifying the look and adding to the core website functionality by adding a plethora of new features.
48,846 users
IBM Aspera Connect
This add-on enables the use of IBM Aspera Connect with Firefox. This add-on requires the IBM Aspera Connect application, version 3.9.0 or newer. IMPORTANT: If you encounter an error "Download failed. Please check your connection", update Firefox.
48,696 users
Tab Auto Refresh
Automatically refresh tabs based on custom time intervals
46,599 users
Flight Tab Pro & Custom Web Search
Install the Flight Tab Pro & Custom Web Search extension to track flight status & access flight info by clicking the favicon on the toolbar & enjoy Yahoo® search from your browser.
45,339 users
vidIQ Vision for YouTube
With insights and metrics that go beyond YouTube Analytics, vidIQ Vision delivers a comprehensive optimization report card for any YouTube video via your Firefox browser!
43,382 users
Ezy Photo Tab & Custom Web Search
Add the Ezy Photo Tab & Custom Web Search extension and click the icon on your toolbar to access editing sites & Yahoo® search
42,242 users
iGraal - Cashback & codes promo
Récupérez de l'argent sur vos achats en ligne, c’est simple avec iGRAAL
41,741 users
1C:Enterprise extension
This extension provides access to file system and cryptography functionality, clipboard, and 1C:Enterprise add-ins.
39,978 users
Easy Games Tab & Custom Web Search
Add the Easy Games Tab & Custom Web Search extension to play all-time favorite games online by clicking the favicon on the toolbar & enjoy access to Yahoo® search from your browser.
39,009 users
Mate Translate – translator, dictionary
Your all-in-one translator for web pages, highlighted text & Netflix subtitles. Translate and learn words in 103 languages.
34,898 users
RESTClient, a debugger for RESTful web services.
RESTClient has been completely rewritten for compatible with Firefox 57. Some functions are still missing (OAuth & OAuth 2.0 authentication).
34,651 users
Open in PDF Reader
Adds a context menu item to send PDF links directly to a PDF viewer like Adobe Acrobat Reader
33,820 users
uBlacklist
Blocks sites you specify from appearing in Google search results
32,156 users
Momentum
Replace your new tab page with an all-in-one productivity dashboard. Featuring daily inspiration, focus reminders, to-do lists, local weather info, and more!
32,075 users
Youtube Audio
Stream just the audio from YouTube to save bandwidth and battery life
30,517 users
Ezy Speed Test & Custom Web Search
Add the Ezy Speed Test & Custom Web Search extension and click the favicon on your toolbar to access a speed test site & Yahoo® search.
30,420 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.
30,165 users