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DOM Inspector Requires Restart
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Stylish Tools Requires Restart
Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey
Extended Link Properties + (obsolete) Requires Restart
This application extends the Link Properties and displays File Size, Last Modified Date, Content Type and HTTP Header of a link...
Warning: developing discontinued, see least
AuctionSearchKit Requires Restart
One-click eBay tools providing useful information to the buyer including a map of where items are located, past feedback on similar items and seller history/statistics.
To create your own collections, you must have a Mozilla Add-ons account.