At first Firefox opened and then immediately closed. Then it simply wouldn't open. I uninstalled it. Changed my profile (as per a suggestion in Support I read about). Reinstalled it. It opens now in "safe/troubleshoot" mode for a few moments. I checked the crash report and there are no current crash reports which might help me with the problem. I can't log back in as it keeps closing after I enter username and try to enter password - i don't think its a password issue - it closes all the time even at other places. I'm at my wits end and don't want to abandon Firefox. Any thoughts appreciated. Many thanks, A