Firefox will not open after fresh install in OSX Lion. "Firefox profile missing."

Question

After recently upgrading OS X Snow leopard to OS X 10.7 Lion I downloaded and ran the Firefox installer package, only to find that Firefox could not open. The error message says "Profile missing – Your Firefox profile cannot be loaded. It may be missing or inaccessible"
I checked Firefox forums and found a script that when run in Terminal allows access to the (upper) Library folder; but this still does not solve the issue.
Obviously, with Lion Apple has deliberately placed a stumbling block in the way of would-be Firefox users.

Answer 1

Thank you. I solved the dilemma, which was one of my own making although I take no blame for it. You see, a while back I grew tired of going through the semantics of manually deleting Caches and Cookies and simply locked those folders (in Users/my name/Library) so that nothing could be added or removed from them without login credentials.
. . . There's where the fly got into the ointment. The Caches folder must be unlocked in order to run Firefox because it uses Caches to store files. Folder unlocked – problem solved.
It seems that OS X Lion has more warts than its predecessors (initially, at least), in that where Apple once gave the user full egress to all venues, it has developed a hard-nosed, up-in-your-face micro-managerial stance with Lion – such as making the System/Library invisible. This, of course, under the tacit label of "offering the user greater security" . . . against himself.
If you fully embrace that logic I've got some s. Florida realty I can dump I mean sell you on the cheap, lol.
I appreciate your kind help.
Thanks.
mike4444