AdBlock for Firefox
The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.
1,210,464 users
LanguageTool Grammar Checker
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
46,406 users
Forget Me Not - Forget cookies & other data
Make the browser forget website data (like cookies, local storage, etc.), except for the data you want to keep by adding domains to a whitelist, graylist, blacklist, or redlist.
15,482 users
User-Agent Switcher
Quickly and easily switch between popular user-agent strings.
86,721 users
YouTube Video Downloader Pro
Video Downloader for YouTube. Download any video from YouTube to popular media formats.
6,364 users
Image Search Pro
Adds an option to the context menu to search an image on multiple services
4,460 users
Download Video and Flash
Download Video and Flash is a great download helper tool that lets you download Flash games and Flash videos (YouTube, Facebook, Dailymotion, Google Videos and more) very easily, with one click. The downloader is very easy to use to download videos.
1,496 users
UI Eraser
Hide Firefox User Interface.
1,119 users
Adblock Plus
Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
11,228,537 users
uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
4,774,128 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
3,127,774 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
2,386,904 users
Facebook Container
Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.
320,355 users
Privacy Badger
Automatically learns to block invisible trackers.
554,870 users
Cookie AutoDelete
Control your cookies! This WebExtension is inspired by Self Destructing Cookies. When a tab closes, any cookies not being used are automatically deleted. Whitelist the ones you trust while deleting the rest. Support for Container Tabs.
143,877 users
Decentraleyes
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
130,647 users