hello, maybe that's an issue with hardware acceleration - please try updating your graphics driver, or in case this doesn't solve the issue or there is no new version available at the moment, disable hardware acceleration in the firefox menu ≡ > options > advanced > general (that setting will take a restart of the browser to take effect).

Hi, thought your advice worked, but it didn't. Is still doing it. How do I find and where for graphic driver updates? I'm not very computer literate. Thank you.

Earlier this year there was a problem update that affected fonts in Vista but not Windows 7.

There was a Windows update a couple years ago that caused font display problems in Firefox on Windows 7 (Windows 7 patch KB 2670838 fries Firefox fonts | InfoWorld). Does that sound like what you might have uninstalled before? I'm not sure whether that is still a problem or whether Mozilla updated Firefox to work around it.

Hi, I went to: about:config. I found gfx.content.azure. ? But not "enabled". I didn't want to mess with the one listed, so didn't. I had done the previous instructions of disabling KB 2670838, etc. and it worked up until the last couple weeks, and its back. It's not too bad yet, so will wait to see if there is another way to fix it. I thank you for your input. Thanx