Have the need to rotate your tabs? No, I do not mean to turn them upside down. Tab Rotator, an add-on for Firefox, will automatically switch between the open tabs in your browser after a certain amount of time.
There is your functionality in a nutshell. Now, I can not really think of why you might want to rotate the active tab after X number of minutes, but I am sure this will come in handy for somebody out there.
The interface is pretty simple, and setting up your rotation time can be done like so:
You can pick up this odd, but maybe helpful add-on from the Firefox Add-ons website. Go ahead, if you like this thing – let me know in the comments how exactly you are using it.