Rated 5 out of 5 stars

Lightweight addon @ 4kb

After restoring Firefox Profile using MozBackup , This addon does not work , But it shows up in addons manager To make it work , I have to disable and again re-enable add-on from add-ons manager and restart firefox

Also available as UserStyle : http://userstyles.org/styles/42417/tabs-in-titlebar-in-restored-window

This review is for a previous version of the add-on (