I've got the same problem actually, the problem is that flash keeps segfaulting, causing the gray box.
If you check dmesg you'll see something like this: [28262.352742] npviewer.bin[13448]: segfault at 4 rip f6ee1d54 rsp ffc48b40 error 4 [28288.212763] npviewer.bin[13559]: segfault at 4 rip f6e3fd54 rsp ffbb1aa0 error 4 You don't need to reinstall flash, restarting firefox completely (close all instances of the browser) will solve the problem. It would be great if this problem could be fixed, but I doubt it has anything to do with ubuntu, its more likely that the problem is in the 64 bit version of the flash plugin. -- firefox shows grey box instead of flash player on amd64 https://bugs.launchpad.net/bugs/246450 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs