Two weeks ago I began to see a start up window that my password didn't match. Nothing more. No idea what password was now emerging as incorrect. Click OK and everything moved forward. I think it had to do with SYNC. Then in the past week, since Monday, May 25, 2015, it is incredibly slow, blinks, fogs, and sends "Firefox Not Responding" messages.

Tried Chrome, works fine. Tried Explorer on my work machine, fine. Not an Internet Service Provider issue. Not a machine issue. This is Firefox issue and with whatever changed, it makes the browser unusable. I suspect it has to do with Sync since that is the change noted. Hope you get it fixed soon. I appreciate the security of FF. I'll keep checking back, but so far, no improvement. Thanks in advance.