The easy way to download and convert Web videos from hundreds of YouTube-like sites.
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.
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.
Squared tabs, appmenu, add-on bar, small button view and many more 'old' features for Firefox 29+ (Windows / MacOSX / Linux).
All builds & changelogs on versions page!
Play all videos on youtube without flash in your preferred size using only HTML5.
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
Screengrab! saves webpages as images.
New features: upload to internet
Gives you a place to put all your add-on buttons without over-crowding the navigation bar.
Visual bookmarks for Firefox. (Works with all latest versions of Firefox)
Changes the Location Bar of Firefox into a Breadcrumb display with rich and interactive features.
custom additions to Stylish extension.
brings back features from 0.5.9 and adds new features
I can't be bothered to change SC, so amo will allow it to be uploaded
Easiest way to Add and Manage Custom User Styles in Firefox.
Add, Edit, enable, disable and delete in-numerous User Style Sheets to redesign the Firefox and the Web.
Display horizontal and vertical floating guides, exactly the way you use it in photoshop. Helps improving layout, placing elements in proper grids, laying out elements symmetrically and structure a design.
Personalize your Firefox Title Bar! Anything placed on Menu Bar will be moved to Title Bar.