The old kernel is still listed in grub and the new one is the default. Whatever was causing the message the logical volumes are there and the message no longer displays on boot. I didn't make any changes and have no clue why I got the message or why it went away, since despite it I always had my logical volumes. I guess the original cause will remain a mystery.
As for my firefox issue, I mean that I am immediately dumped back to my logon screen. It does not happen all the time. Seems to happen when I close firefox with multiple tabs open, but not always. The next time I open firefox I get a message saying that my session unexpectedly ended and asks if I want to restart the old session or open a new one. So far I haven't lost any data since usually nothing else is running when I am surfing the web, but I assume lost data is a possibility if any output buffers have not been cleared when this happens. I am unable to repeat this at will so I can't really zero in on the actual problem. Has anyone else experienced this action?