DownThemAll! Requires Restart Featured
The first and only download manager/accelerator built inside Firefox!
User Agent Switcher Requires Restart Featured
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
Encode selection, links and images to QrCode with right-click.
Gmail Notifier (restartless) Featured
Multiple account (or label) Gmail notifier (without storing passwords)
Download Plan Featured
An addon to download files at specific time interval
Free Memory Featured
An add-on to perform free-memory operations without visiting about:memory.
For Firefox 40+, try Free Memory 2.0 https://addons.mozilla.org/en-US/firefox/addon/free-memory-20/
Lightbeam for Firefox 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.
Google Translate (Dictionary) Anywhere provides access to a floating multilingual Google Translate panel on any webpage.
Duplicate Tabs Closer Featured
Detects and automatically closes duplicate tabs.
User-Agent Switcher Featured
Quickly and easily switch between popular user-agent strings.
YouTube Enhancer Plus Requires Restart Featured
Improve your watching experience! Ad Blocker, Autoplay Manager, Auto HD, Auto Replay, Cinema Mode, and more.
Tab Memory Usage Featured
Tab Memory Usage displays the amount of memory is used by each tab
Adblock Plus 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).
Slim Add-ons Manager 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.
Google™ Translator Lite Featured
Google™ Translator Lite
Reload Plus Featured
Supercharge your reload button and hotkeys!
QR Code Image Generator Featured
Create a QR Code of the selected text or current URL. Use CTRL-SHIFT-Q to quickly see the QR Code. Also possible to create a QR Code from free text within Firefox. Works completely offline! Now with UTF8 support.
YouTube Anywhere Player Featured
Watch videos anywhere in cinema mode without leaving the website you're on.
Bluhell Firewall Featured
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
LeechBlock Requires Restart Featured
LeechBlock 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.