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Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Multifox No Restart Featured
An extension that allows Firefox to connect to websites using different user names. Simultaneously.
*** Multifox 2 users: try the "Window Mode" (Addons - Multifox - Options) ***
Reader No Restart Featured
Reader is the ultimate Reader tool for Firefox.
FoxyProxy Standard Featured
FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.
Download YouTube Videos as MP4 No Restart Featured
An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a simple interface and it downloads videos directly from YouTube. The extension integrates with YouTube's interface and adds a download button below the player.
Rainbow Color Tools Featured
Color tools for web development.
Color picker and eyedropper + saving colors and trying out colors with drag and drop.
iMacros for Firefox Featured
Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the soluti...
Pearltrees No Restart Featured
Pearltrees lets you organize all your interests.
Nimbus Screen Capture - editable screenshots No Restart Featured
Screen capture Web Page, selected region or whole browser window, edit screenshots and save the images to Local File or Google Drive. Edit screenshots in a very user-friendly interface with the different tools.
Slim Add-ons Manager No Restart Featured
The Add-ons Manager slims down!
This add-on reduces the height of entries in the Add-on Manager, so you can display more of them at a time.
Private Tab No Restart Featured
Adds private tabs.
Clear Console Featured
One click to clear your cache, cookies, history, html5/local storage, http logins, all of them or restart your browser with/without notifications.
LastPass Password Manager Featured
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
Clean Links No Restart Featured
Lightweight Themes Manager No Restart Featured
Manage your installed personas (lightweight themes).
BugMeNot No Restart Featured
Bypass compulsory web registration with the context menu via www.bugmenot.com.
Bluhell Firewall No Restart Featured
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
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.
Wired-Marker(http://www.wired-marker.org/en/) is a permanent (indelible) highlighter that you use on Web pages. The highlighter, which comes in various colors and styles, is a kind of electronic bookmark that serves as a guide when you revisit a Web ...