Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
Kimetrak
Kimetrak (Who's tracking me) is an extension allowing you see at a glance what third-party domains are loaded from websites you visit. You can access detailled statistics with a list allowing you to analyse what services are able to track you online.
3,289 users
Share Backported
This extension reimplements the share feature in Firefox with container support (also for Facebook container), many social networks and services supported!
2,071 users
Don't touch my tabs! (rel=noopener)
Prevent tabs opened by a hyperlink from hijacking the previous tab by adding the rel=noopener attribute to all hyperlinks (excluding same-domain hyperlinks).
6,001 users
Default Bookmark Folder
Allows you to choose the default bookmark location folder and quickly bookmark pages via a dedicated icon.
21,647 users
Enhancer for YouTube™
Tons of features to improve your user experience on YouTube™.
503,470 users
SoundFixer
Lets you fix annoying sound problems in YouTube videos and such. Like audio in one channel only, too quiet or too loud. (Unfortunately, doesn't work on many other websites because of cross-domain issues — but it does work on YouTube.com!)
14,692 users
YouTube High Definition
YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.
196,491 users
Video Speed Controller
Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
31,344 users
Wikiwand: Wikipedia Modernized
Good old Wikipedia gets a great new look
17,343 users
Wikipedia Peek
Shows previews of linked articles on Wikipedia pages.
3,342 users
Wikipedia Context Menu Search
Search for highlighted text on Wikipedia via the context menu.
2,934 users
Random Unusual Wikipedia new tab
Redirects to a random unusual Wikipedia page when you open a new tab, because when you're opening a new tab you're looking for a distraction and that distraction might as well be a weird fact. Or show random Cognitive Bias, or Philosophical concept.
72 users
Tree Style Tab
Show tabs like a tree.
129,519 users
New Tab Override (WebExtension)
New Tab Override brings back the ability to change the page which is shown when opening a new tab.
105,620 users
Tab Auto Refresh
Automatically refresh tabs based on custom time intervals
53,720 users
OneTab
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory
81,669 users