Location of Firefox folder
Correct me if I'm wrong - it's my understanding that Firefox is a technology release , and it's quite happy to be located anywhere really.
Anywhere that you as a user have permissions, of course. I simply keep mine in a subfolder of my /home directory. Easy to find, when it comes time to clean house for version 0.9 whenever that comes around.
Firefox is my primary web browser these days. Nice piece of software.