Try updating your Firefox. I just did an update last night and it looks like the fix now works in Firefox as well. There are still a few banners stored on 3rd party servers that aren't fixed but we are working on those. The locally stored banners that are flash files that you can test it with are the Banks ad, the Kore performance ad, Industrial Injection, and the Magnaflow ad. Give an update a try and let me know what you find please.