Firefox users who want to hide the tab bar can do so with a keyboard shortcut combo. By default, the tab bar is visible when Firefox is opened. To hide it, press Ctrl+Shift+T (or Cmd+Shift+T on a Mac) to open the Custom Keyboard Shortcuts dialog box. In the dialog box, type “:tabbar” and press Enter. The tab bar will now be hidden. To show it again, press Ctrl+Shift+T (or Cmd+Shift+T on a Mac) and type “:tabbar” again. ..
Here are the options for the extension. You can quickly customize how Hide Tabbar works to make it fit in nicely with your other keyboard shortcuts. If you love the idea of an auto-hide feature, then you can enable that as well with a custom time setting.
As you can see there are a lot of keyboard shortcut combo options available. We decided to experiment and shorten things up a bit more on our system by setting the “hide tab bar trigger” using only the Page Up Key without a combo (which worked perfectly well).
Note: Works with Firefox 4.0 – 4.0.*
Install the Hide Tabbar Extension [Mozilla Add-ons]
