I recently got a new laptop which I've installed Ubuntu to. It's working wonderfully, better than I was afraid it would. Unfortunately it won't run Compiz on the graphics chipset that was included (some Intel integrated thing) but that's hardly a big deal.
In any case, I figured I'd use the Ubuntu Firefox Addon installer to install the mouse gesture addon.
It, uh, didn't work.
It did install Thunderbird though.
Unfortunately it didn't actually install the mouse gestures addon into either Firefox or Thunderbird.
I think it might need some more work.