Single Key Tab Switch is a SeaMonkey extension that brings the 'Single-key shortcuts' feature of the Opera browser to Mozilla Firefox, letting you use (by default), 1 and 2 to go to previous and next tab, respectively.
To configure key bindings, enter about:config in your address bar, and search for the following properties:
These properties should be set to ONE character only - the character for the key that should trigger the tab switch.
What's New in This Release: [ read full changelog ]
· Bumped supported Firefox version to 4.0b6.
· Added SeaMonkey support.