Can't fix this FF problem on my laptop!

Hello,

I didn't even tell FF to upgrade itself, it just DID. I'm seriously angry because I was specifically avoiding this newer version of FF for this exact reason.

How do to uninstall and revert back to before my upgrade?

I can't open my Facebook or Hotmail, Gmail or work email to check anything.

WTF, firefox???? At least prompt me before just hijacking my da*n computer like this!