This is definitely the extension that I was looking for since long time, a really full screen Firefox! FullerScreen does it very well, it hide toolbars and status bars and make them visible again when the mouse pointer hits an edge of the screen. The extension is cross-platform tested on Windows and Linux, should work fine on Mac, and is licensed under the Mozilla Public License. Now you can read better your favorite blogs or newspapers, enjoy!
Normal view Firefox
Fuller Screen view Firefox