View xml data in textareas, in readable format.
Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey
Personalize your Firefox Title Bar! Anything placed on Menu Bar will be moved to Title Bar.
Adds a small badge to your tabs to alert you to (for example) new messages on Facebook. The badge is also visible when the tabs are pinned so you can see when there's something new available.
Share on Google+the current URL. Click right and click "Google+ Share".
Switch between website fonts and your own selection.
Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.
Hides the bookmark toolbar until you move the mouse above it.
Use Windows and Internet Explorer Favorites directly from Firefox. No need to import, export or synchronize - the same Favorites appear...
Create a QR code (generated via the Google Charts API) from the current tab's URL or selected text. It is useful for quickly opening a webpage on a mobile device, for example.