What really annoys me is when I've been tab browsing for awhile, say somewhere you can really get lost like youtube, and have a few dozen tabs open, and all of a sudden.... pinwheel.... pinwheel.... pinwheel.... BAM. safari quits.
I've been getting that fairly often recently when I have a lot of tabs open. Really annoying. I wish it did the same thing FF did and restored tabs after a crash.
Likely Flash crashing you. You could try the
HTML5 version of Youtube.
As to restoring tabs, just go to History-->Reopen All Windows from Last Session
