maybe try toggling the hardware acceleration feature inside FF's options

Thanks, but I have never had it on. Turn it on?????

Do you use any addons? Ive noticed that sometimes an addon can do this. If you do, disable them and see if this works. If it only happens with eBay than maybe there is an issue with that site which might resolve itself after a while. Try clearing history too. At the moment nothing else comes to my mind. And apologies if you have tried these suggestions already. Its hard to tell what has and has not been done.

The only add on I use is Print Edit WE. Thanks for the help though.

I seldom see the message and I understand it can be a nuisance. I just wait for it to go away. EDIT: Could your settings on the Privacy & Security page in Options/Preferences be lessened?