Geez, dunt get so defensive.  It was an "FYI".  Nothing more.  I could care less what browser anyone uses.
Just don't think FireFox is bullet-proof.  It is software and no software is perfect.
Most people will never have a problem with any browser.  I know I have not and have been around the Internet longer than most people.  But I do a lot of things, right up front, to prevent problems instead of accepting the defaults (which pretty much will gaurantee problems).