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Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Add-ons Manager Context Menu Featured
Add more items to Add-ons Manager context menu.
YouTube High Definition No Restart Featured
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.
Add Google Search To New Tab Page Featured
An extension that adds a Google search box to the standard Firefox new tab page
QuickMark No Restart Featured
A quick and minimalistic way to create bookmarks.
Web Developer Featured
The Web Developer extension adds various web developer tools to the browser.
YouTube Control Center No Restart Featured
YouTube Control Center is an open-source project that aims to enhance the overall YouTube experience by providing the end user with more control in what the playback process is concerned.
Session Manager No Restart Featured
Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.
Privacy Settings No Restart Featured
Alter Firefox's built-in privacy settings easily with a toolbar panel.
Download Status Bar No Restart Featured
If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.
Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).
Copy As Plain Text Featured
Removes formatting from copied text.
Toolbar Buttons No Restart Featured
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Adblock Plus No Restart Featured
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).
Beyond Australis No Restart Featured
Australis was the code name for the current Firefox theme, it aimed to make a great browser look awesome. Now you can go one step further and also make it feel awesome to use!
Pray Times! Featured
Display daily Muslim prayer times.
YouTube Anywhere Player No Restart Featured
Watch videos anywhere in cinema mode without leaving the website you're on.
Lightbeam for Firefox No Restart Featured
Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
Gmail Notifier (restartless) No Restart Featured
Multiple account (or label) Gmail notifier (without storing passwords)
Mind the Time No Restart Featured
Keep track of how much time you spend on the web, and where you spend it. A toolbar ticker shows the time spent at the current site or the total time spent on the web today. A summary page sums up data for the past 70 days, 10 weeks, and 6 months.
The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color and makes them easy to distinguish while beautifying the overall appearance of the interface. For Seamonkey & Flock. An essential. F...