Allows the download manager to also open in a tab or sidebar, and adds some optional display changes.
Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.
Firefox OS Simulator is a test environment for Firefox OS. Use it to test your apps in a Firefox OS-like environment that looks and feels like a mobile phone. After installing it, go to Web Developer > Firefox OS Simulator to access its features.
Adds the ability to create and edit entries in the password manager.
Make any pages' search functionality available in the Search Bar (or "search box")...
Control what gets sent as the HTTP Referer on a per-site basis.
Save an image of a web page (including Flash content) to a file. Web page screenshots may be captured interactively or from the command line. Options allow you to control the output format (PNG or JPEG), image file name, scaling, and much more.
Adds an about:addons-memory page that details add-on memory usage