It would seem the key is explained by the browser.tabs.closeButtons setting ( http://kb.mozillazine.org/Browser.tabs.closeButtons ). Mine is set to 5. If I set it back … (read more)
It would seem the key is explained by the browser.tabs.closeButtons setting ( http://kb.mozillazine.org/Browser.tabs.closeButtons ). Mine is set to 5. If I set it back to the default of 1, then I get the close buttons ("x") showing up on the tabs again (or on the active tab only, if there are several). But 5 is not a valid value according the description. I'm sure that *I* did not change it to 5. So anyway, I changed it in safe mode back to the default of 1, and the close icons appeared immediately. Yeah! So then restarted firefox to have the add-ons working again. This caused it to be be automatically changed to 5 again. Grrrr!
Is there no way to trouble-shoot which add-on is screwing with the setting? I mean, other than turning them off one by one and restarting firefox each time? That could take all day.