Rated 5 out of 5 stars
I am a keyboarder and linux / kde user.
I very much like being able to Ctrl+Tab between 'recently used' tabs (windows)...
I might, at times have 6 windows and > 200 tabs open, and working on several projects at any given time...
I even reassigned Ctrl+Tab from KDE / 'activities' desktop switch to use this.
I wish we still had 'tab preview' feature. I've issued several 'bugzilla' reports on it and mozilla feedback (input.mozilla) posts.