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).
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
The first and only download manager/accelerator built inside Firefox!
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
Use the Evernote Web Clipper to save things you see on the web into your Evernote account.
With EPUBReader you can read ePub files just in Firefox. No additional software needed!
Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
Protect your Passwords, Payments, and Privacy.
Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
Never lose anything you type into a web form again! Lazarus securely auto-saves all forms as you type, so after a crash, server timeout, or whatever, you can go back to the form, right click, "recover form", and breathe a sigh of relief.
Make sure your tabs stay visible all the time.
A productive way to organize, read and share the content of your favorite feeds, blogs and news sites. Feedly offers a seamless transition from Google Reader.
Shows a full size image when you hover over thumbnails on popular websites like Facebook, Twitter or Amazon.
A GNU/GPL telnet client extension specifically designed for BBS browsing.
Extends the Mozilla Add-on Collector allowing to install multiple add-ons with a single click. NOTE: This addon is no longer in development. It is still here for the convenience of existing users. Do not download unless you know what you are doing!!!
Collections are groups of related add-ons that anyone can create and share.Explore Collections