Firefox problem

[iviv]

Right, I'm freshly back from a format, and like the muppet I am, I forgot to backup my firefox profile. Not a massive problem, I've already redownleded the few extentions I had, however I now can't switch between tabs using my mouse scroll wheel. Instead, it now either does nothing or, if there are too many tabs to show along the bar, scrolls the bar sideways so I can see more tabs.

I've looked through the options but can't see anything, though I haven't yet installed my mouse drivers, which may be it.

Thanks

Edit: Oh, I'm more organised than I thought, I did back it up. All working now, huzzah!