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Tab Counter
A simple extension that counts the number of open tabs per window and displays the count in the toolbar...
Restartless Restart
This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
Close last tab with middle-click
THIS ADD-ON IS NOW UNNECESSARY FOR FIREFOX 31 AND UP!
Tired of middle-clicking on the last tab in Thunderbird, only to have nothing happen? This add-on embraces the industry-standard middle-click behavior of IE, Chrome, and Firefox (3.6- and 31+).
TabSubmit
Lets the user direct the submission of a form to a new tab or window. [Bug #17754]
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