Hide Tab Bar With One Tab is a simple and handy Firefox add-on designed to automatically hide the tab bar if only one tab is open.
As soon as you open a seconds tab, the tab bar will automatically be displayed again.
Hide Tab Bar With One Tab is cross-platform and it works on Mac OS X, Windows and Linux.
- Now correctly checking for number of tabs when Tab Groups are used.
- That's also means no waiting for second tab to close before the tab bar is hidden, more like how Firefox did it originally.