Okay, this is weird. I went on Firefox this morning and I can't open any windows in new tabs by middle-clicking. I know that's the default shortcut for opening it up, and I don't think you can change it, but I'm not sure how it was disabled. Yesterday I was on Firefox and I could middle-click just fine.
Well, the problem is I'm using a laptop, so the mouse options are for the trackpad (I use a USB mouse most of the time). The middle-click works on the trackpad, but for the USB mouse it doesn't work.
Hmm I'm almost certain it's a problem with your mouse settings, so you think there's a way of changing that? Maybe try disabling the other mouse temporarily through device manager?
Boom-shaka-laka! Rawr come and join us in the Randomness Sig Halloween'd by Tom!
Well, I have the option set where if I plug a regular mouse into USB, the trackpad is disabled. I know the button isn't broken because I hear the click.
Oh, and not only is it not letting me open tabs and whatnot, it won't let me use the fast scroll down.