Changes the way Firefox handles new window links without warning, "feature" cannot be toggled, and does not change the settings back when uninstalled Rated 3 out of 5 stars
This seems like a very well-designed extension; its features just weren't for me. I would give it 5 stars. HOWEVER I do have to knock off a couple stars because, as soon as this extension is installed, it changes the way Firefox handles tabs in a way that cannot be controlled by the user. Even choosing the Tab Kit option "Disable all features", or disabling or uninstalling the add-on, will not restore the functionality that Tab Kit changes.
Tab Kit causes all links to open in new tabs without exception. Firefox default settings are more subtle and are described pretty well here: http://support.mozilla.com/tiki-view_forum_thread.php?locale=fr&forumId=1&comments_parentId=308827
Essentially, Firefox's default behavior is to open all "new window" links in new tabs UNLESS the link specifies the size, position, etc of the new window. Tab Kit gets rid of the "unless" caveat by changing tab behavior settings in about:config, does not give the user the option to change these settings back, and does not restore these settings when disabled or uninstalled. See the link above to figure out how to do it on your own by editing about:config.