Les Mikesell: >> Try 'strace firefox' from a terminal window, then scroll backwards >> through the output to see if there is a failing system call that >> makes any sense. oldman: > Also try from terminal: > killall firefox > > As we have seen periodically that firefox crashes leaving a small > program running that prevents ff from starting again. I've had one PC that I couldn't get Firefox to start up on for a few days, and now I've just got around to having a look why. I tried Les' suggestion, but strace isn't on my system (and I don't know where it comes from to install it). I tried your suggestion, but there wasn't anything running. I had a look into my profile directory, and saw what my problem was: a "lock" file belonging to a previous session that shouldn't be there anymore. I deleted that, and I could run Firefox again. I suspect that problem occurred when I accidentally unplugged the power while the PC was running. I forgot what applications were running at the time, it rebooted without any dramas, so I never bothered to check on whether anything needed fixing straight away. -- Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists.