I found a reference to the problem here:
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/81858
I tried the recommended solution and it seems to work:
Potential Workaround (verified to help for some):
Use Option "XaaNoOffscreenPixmaps"
in your xorg.conf device section
It seems like a problem I hit before because I recalled reading this some months
ago and may posted about it here. I think it's the reason I initially avoided
Firefox. They call it a minor bug but it was a major problem for me. I may
have assumed at the time that Ubuntu bugs get passed upstream to Debian, but
evidently not.
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]