If you’ve recently upgraded to Firefox 3.5 and you use Tabs as much as I do, then you may have noticed that you cannot close the last tab, without closing the Firefox browser entirely. This behavior is different than the previous version, Firefox 3.1. Sometimes I like to ctrl+w all my tabs to start fresh. The previous version use to close all the tabs and on the last tab would just clear out like it was a brand new tab. Do not fret, there is a fix!

Go to about:config in your Firefox browser…

filtered the results on the keyword “tab“…

Set browser.tabs.closeWindowWithLastTab to false.

That should do it, now when you close all the tabs, it won’t automatically close Firefox. Enjoy!