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 first and only download manager/accelerator built inside Firefox!
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.
Collector's Note I use this only for the "OSX Style for New Google Reader Slightly Improved" userstyle ( http://userstyles.org/styles/14293 )
The Web Developer extension adds various web developer tools to the browser.
Browse faster—Preview links and images without leaving your current page or tab. Just mouseover any link and a preview window appears to display the content.
Note from Mozilla: This add-on has been discontinued. Try Video DownloadHelper instead.
Download YouTube - The best YouTube video and music downloader for Firefox.
View and manage downloads from a tidy statusbar - without the download window getting in the way of your web browsing.
Thanks Tekzilla for your awesome review! Click here to see their video: http://youtu.be/BUDqWrJ-Vao
A simple extension that counts the number of open tabs per window and displays the count in the toolbar...
TabGroups Manager helps to classify and organize tabs by dividing them into Groups. Because tabs become easier to manage, you can never have too many! TabGroups Manager is ideal for tab power users.
Collector's Note Excellent tab-groups addons. Can't recommend this one enough.
Lets you replace text in web pages. You can define a substitution list and apply it automatically or at your own discretion, or make individual substitutions. You can use this as a filter, or just for fun :)
This extension adds a new "FaviconizeTab" option to the context menu of the tab...
Speed up browsing on Craigslist by putting images right in with search results. Also has a text preview option, image resizing, and image zoom-in, all with smooth animation.
Collections are groups of related add-ons that anyone can create and share.Explore Collections