By coincidence, just this morning I had a panic because I tried to close FF by closing the only window (which is something I need to do periodically because memory usage will build up over time), and I thought I had lost the tabs because when I opened it back up, they were gone with no way to restore. Apparently the behavior had changed so that closing the last window no longer closes FF, but just that window a la Skype.
(Fortunately I was able to figure out what was going on and restored the previous window.)
Also, the automatic "check before exiting FF" got turned off somehow.
(Fortunately I was able to figure out what was going on and restored the previous window.)
Also, the automatic "check before exiting FF" got turned off somehow.
So, yeah, lots of fun surprises to deal with.