Thanks - that's what I thought. Wish I knew how the openjdk stuff got
installed in the first place - I didn't explicitly request it.
Probably came down with some updates.

Anyway: removing the openjdk (IcedTea) runtimes didn't change
anything: Firefox still crashes at my usual Java enabled sites.
Removing and reinstalling the Sun Java runtimes doesn't seem to have
made a difference, either. (No Firefox crashes with all the runtimes
gone - but no functionality, either.)

Tried removing / reinstalling the flash plugin, too - the FOSS ones
have given me grief. (I use the "nonfree" Adobe flash plugin.)

Still no luck, and I'm officially baffled. I suppose I could remove
the Sun runtimes, and install the openJDK stuff. But I've had such
bad luck with the IcedTea runtimes in the past.

Any ideas?