This extension switches your themes at random.
Shortcut key "Ctrl+Alt+S" is provided, so that you can randomly switch themes in a much faster manner.
Firefox Tools menu:
(1) "Random Theme Switcher" Options menu shortcut button.
Firefox File menu:
(2) "Theme Shuffle!" button ~ allow you to switch theme without losing your old Firefox session.
Note: Not compatible with Persona themes and if you have no theme installed, this extension is of no use.