Sooooo close to perfect! Rated 4 out of 5 stars

OMG! This is exactly what I've been looking for for ages but better. Originally I just wanted to hide the bookmark bar till hovered over and needed but it was slow and laggy. This is almost instant. Much more stable. I have only two problems with it. One it's annoying that when switching tabs via keyboard shortcut the awsome bar and bookmark bar show up. Not a big issue, just annoying cause to hid them you have to move the mouse again. The second is a major problem. It's incompatible with speed dial. I'm assuming any other blank tab based extensions as well will get the top layer hidden. Moving the mouse does not hide the bars at all. Please fix this. I really want this add-on soooooo badly. Thank you so much for developing this.

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

You can also hide the toolbars after switching tabs by pressing a key like down or space. The special pages (like about:home, about:addons and add-on pages) should behave just like other pages. So clicking or scrolling on them will hide the toolbars.