Computer gemlins are crashing fire fox grin... A few reasons why it could be crashing. Malformed web site as in buffer overflow errors, too full cache file, updating from netscape to firefox with out uninstalling netscape 6 or 7, or even worse having both firefox and netscape 6 or 7 installed at the same time they both try to use the same profile and it gets very ugly fast. Could be a new glitch that lucky you get to see and hopefuly tell the guys that make firefox about it so it can be fixed. And try not to keep firefox running for a whole day at a time, exit it and open again a few times a day. If you mean like when you are posting to a web fourm, use notepad or even word write what you want to say save it than copy and paste it. That way if you get a firefox crash you do not lose data.
_________________
"Reality is that which, when you stop believing in it, doesn't go away." Philip K. Dick