Rated 4 out of 5 stars

I like to have as much real estate for browsing as possible, and this addon works like a charm! Just a recommendation: add a settings window to adjust the delay for hiding and showing the "chrome" and you're all set!

This review is for a previous version of the add-on (1.1-signed.1-signed). 

Which delays are you referring to? When you move the mouse to the tabs area as well as when you move out?