Can you attach a screenshot? *http://en.wikipedia.org/wiki/Screenshot Use a compressed image type like PNG or JPG to save the screenshot and make sure that you do not exceed the maximum file size (1 MB). ---- A possible cause is a problem with the color profile for your display monitor or color profiles embedded in images.<br /> You can disable color management to test that.<br /> You can set the pref gfx.color_management.mode to 0 on the about:config page to disable Color Management.<br /> You need to close and restart Firefox to make the change effective.<br /> See: * http://kb.mozillazine.org/gfx.color_management.mode