Here’s a new error that I experienced recently on my Snow Leopard laptop: I’m playing a YouTube video in Firefox, then suddenly the blue screen of death appears and I’m presented with a login screen. Meanwhile, the audio track associated with the video continues to play in the background.
After logging back in, I try to launch Firefox and am prevented from doing so because OS X says another copy is already running. I check Activity Monitor and the utility confirms that another instance of Firefox is active in memory.
Opening Console I scroll the log until I see the following message:
1/19/13 3:10:24 PM [0x0-0x22d22d].org.mozilla.firefox error: collusion: An exception occurred.
I resign myself to force quit Firefox and restart the video from the beginning. Afterward, I chalk this experience up to just another one of those mysterious bugs that occurs every now and then.