Installed Firefox 22. No issues, works with all of the few plugins I have.
One little item: IceWM can't find the nice firefox icon to display in the title bar; but like I said -- IceWM. Probably not set up to look in the right places.
The icon for the Menu launcher is correct. Firefox 22 is faster than Firefox 19.
Edit: Tested with JWM, which finds the titlebar icon fine. If I stumble across the answer, I'll put it in a place appropriate for IceWM users.
A lot of work goes into all you do, but it looks like getting this version of Firefox to 7.0 32-bit was extra trouble. Thank you for getting it done.