Joachim Backes wrote:
See: When calling "www.macrovision.com", then at the top of this web page you will see a bar (Solutions by Industry,...) containing pull down menus. The pulldownmenus a arising if you traverse this bar. But these pulldown menus are transparent, that is: their background is empty so they cannot be properly read.
I just called www.macrovision.com and it's works well. Background is not transparent "dark blue" and by moving mouse "red". Try remove directory ~/.mozilla/firefox and run firefox again. Best regards, Alor