Can you try to start Firefox in Safe Mode to see if Firefox works properly with no error? You can start Firefox in Safe Mode below:

• Windows/Mac: Go to Help > Restart with add-ons disabled
• Linux: Run firefox -safe-mode in the Terminal/Konsole

If Firefox opens up fine with no problems, it's probably one of your extensions that's causing the issue. You can re-enable your add-ons one by one until you find the one that causes the issue upon being re-enabled.

I tried Safe Mode, and it took a little longer to appear, but ultimately the two finger scrolling froze up again while in safe mode. I should note I can also scroll using the keyboard without any trouble. It's just the 2 finger track pad function that seems to get lost. Very strange.

Hello sunvox,

This seams not to be a problem related to Firefox, it's more likely related to OS X itself. I'm a Mavericks user myself and I've experienced this a couple of times. When it occurs, it's not only Firefox that bugs though, it's all browser I've installed.

I have yet to find a solution. A temporary fix is to either reboot or log out of your account and log in again.

I'm not sure I agree with your analysis as in my situation I have not experienced this problem when using either Chrome or Safari. I only lose control of 2 finger scrolling in Firefox. In addition I have been using this Magic Trackpad for well over 2 years and the problem only started yesterday. Finally, I would note that an online search brings up an equal number of people with this problem only on Firefox and also on multiple platforms so I feel there may be more than one program that can cause this issue, but in some instances it is just one program, and given my experience I feel my case is the latter.

It would be a shame to stop using Firefox after so many years of loyal use just because my trackpad doesn't work.