Did you block images in Firefox? Check Options > Content and see if "Load images automatically" is checked. If so, look at exceptions and make sure you did not block images for that site there.

Make sure that you allow pages to choose their colors and that you haven't enabled High Contrast in the Accessibility settings.

• Tools > Options > Content : Fonts & Colors > Colors : [X] "Allow pages to choose their own colors, instead of my selections above"

See also:

• http://kb.mozillazine.org/Website_colors_are_wrong
• http://kb.mozillazine.org/Websites_look_wrong

Hello, none of this answers solved the problem! please somebody help! maybe I'll take a while to answer because the problem is in my father's computer, I don't have it with me all the time.

Did you check all possibilities from the "Website_colors_are_wrong" article including the Windows accessibility setting?

• http://kb.mozillazine.org/Website_colors_are_wrong

Start Firefox in Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.org/kb/Safe+Mode

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I have checked all this possibilities from cor-el answers, nothing solved the problem, I appreciate you guys attempting. I think the problem is not with firefox, because i have uninstalled everything version, folders and files and registry entries. As I said before, the problem seems to be with the windows c++ library, thus who gonna solve this problem is a developer that works with firefox's graphical library. they know the problem.