Legacy version (get latest on outwit.com). OutWit Hub contains dozens of recognition and extraction features to ease your Web searches and organize your collections. Automatically browse through pages, collect and format the information you seek...
Operator leverages microformats and other semantic data that are already available on many web pages to provide new ways to interact with web services.
Paste URL or text to any tabs or a new tab and load it immediately, like 'Paste & Go' feature, but unlike 'Paste & Go', this extension will paste text from clipboard to a tab without focusing on the tab first.
Note from Mozilla: This add-on has been discontinued. Try one of these instead.
Get rid of all toolbars in fullscreen for kiosk applications.
Legacy version (get latest on outwit.com). Browse though images online with just a few clicks: View collect images from the Web effortlessly. Scroll through high-res photos, drag them into your basket, view slideshows & save directly to your disk.
Like homestarrunner.com? Notice how small the cartoon is? Fix it with this extension!
Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.
Tab grouping, vertical tab tree, multi-rows, and various tweaks for power users.
Adds 'Full Screen' toolbar button and context menu command.
This is (partially) redundant as Firefox 4 finally comes with its own full screen button to add to the toolbar, which is why I'm discontinuing future support for version 4 onwards.
Note from Mozilla: This add-on has been discontinued. Try Evernote instead.
Clipmarks lets you clip and share specific parts of articles, or anything else you read.