Sidebery
Vertical tabs tree and bookmarks in sidebar with advanced containers configuration, grouping and many other features.
77,056 users
Polish Spellchecker Dictionary
Polish spell-check dictionary for Firefox, Thunderbird and SeaMonkey.
76,448 users
Brazilian Portuguese Dictionary (New Spelling)
The same spellchecker shipped with the Brazilian version of Firefox.
76,350 users
Phantom
A crypto wallet reimagined for DeFi & NFTs
75,669 users
Custom Search Tool
Get a custom search tool powered by Yahoo!
75,276 users
Unhook: Remove YouTube Recommended Videos Comments
Hide YouTube related videos, comments, video suggestions wall, homepage recommendations, trending tab, and other distractions.
74,943 users
Privacy Possum
Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.
74,899 users
Tabliss - New Tab
A beautiful New Tab page with many customisable backgrounds and widgets that does not require any permissions.
73,028 users
AVG Online Security
AVG Browser Security and Web Reputation Plugin. Offering protection against known phishing and malware sites, improving your browsing overall browsing experience with crowd sourced web reputation rating.
72,067 users
Block Site
A customizable, password-protected website blocker and redirector.
71,555 users
Saby Plugin Extension
Это расширение предоставляет транспортного агента для взаимодействия с приложением SBIS Plugin на сайте https://online.sbis.ru Расширение полностью бесплатно, не имеет пользовательского интерфейса, нужно исключительно для реализации канала связи.
71,303 users
AdNauseam
Blocking ads and fighting back against advertising surveillance.
69,499 users
LeechBlock NG
LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
69,134 users
Download Video and Flash - HD Download
Download Video and Flash - HD Download is a great download helper tool that lets you download video and Flash games very easily. Download from YouTube, Facebook, Dailymotion, Vimeo and more. Download and enjoy! Download now!
68,546 users
Dizionario italiano
Add support for Italian to spellchecking
68,025 users
Plasma Integration
Multitask efficiently by controlling browser functions from the Plasma desktop.
67,661 users
The Camelizer - Price Tracker
Add price history charts and price watch features to Firefox when viewing product pages on Amazon. Use it to make informed purchasing decisions and to receive price drop alerts via email, Twitter, or RSS feed.
67,220 users
Global Speed
Set a default speed for video and audio.
66,372 users
Don't track me Google
Removes the annoying link-conversion at Google Search / maps / ...
66,281 users
New Tab Override
New Tab Override allows you to set the page that shows whenever you open a new tab.
65,990 users
Auto Tab Discard
Increase browser speed and reduce memory load and when you have numerous open tabs.
65,024 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.
64,255 users
Bitdefender TrafficLight for Firefox
Bitdefender TrafficLight adds a strong and non-intrusive layer of security to your browsing experience
64,000 users
Clear Cache
Clear browser cache with a single click or via the F9 key. F9 Fever! ;)
63,696 users
RoboForm Password Manager
RoboForm, the #1 ranked Password Manager makes your life easier by remembering passwords and logging you into websites automatically
63,606 users