You can check for problems with current Shockwave Flash plugin versions and try this:

• check for updates for your graphics drive drivers
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
• disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)
• disable hardware acceleration in the Flash plugin

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

None of this helped. This didn't start happening until the last two versions of Firefox and now it's become an every-session occurence that gets worst the longer the session lasts.

I disabled shockwave flash in plugins and everything is back to normal

I'm also having a problem with searching through Yahoo! Images that sometimes the outline inset/insert for the photo loads, but not the photo, itself. I'm not sure what the heck is wrong with Firefox's rendering of graphics. Just now, I had to end a session when my tabs I opened wouldn't close out.

Did my information for my system not post in the origainal post? I thought someone would have been able to tell me by now if I'm having errors with my graphic card or something it's compatible. Again, no other browser seems to be giving me this problem.