Mighty Mouse and Firefox

I have been having a "problem" with my Apple Mighty Mouse in Firefox on my Mac. Instead of scrolling horizontally, moving the ball left and right made Firefox go forward and backward through history. I hated this action, and it's really been a nuisance to me.

Tonight I decided to do something about it. I found this article on macosxhints. The second entry seemed to work for me. I now don't have the forward and back scrolling problem and all is well.