Firefox and Youtube videos were working after upgrading from 10.04 to 10.10 but a couple of weeks ago, my Youtube flash video player shows up as a grey box. The sound still works and I can hear the clip playing, but I can not see the video, or even the controls.
This is true for many of the flash based video players, and I think it even happens to some of the flash games out there on Firefox.
Everything works fine on Chromium. This isn't that weird because Chromium has its own flash plugin. However, some flash players still function properly on Firefox, like the full episode flash player on thedailyshow.com
Why would flash be grey box for some flash players but not all?
I have a 32bit system, and a ATI x300 GPU card, which has been giving me problems right after updating to 10.10, but that seems to be resolved now. I selected the allow proprietary codecs stuff at install , and then installed the Adobe Flash PPA and plugin in Ubuntu Tweak.
Best Answer
I would advise removing the Ubuntu Tweak PPA from your software sources by opening the Software Centre then clicking
Edit->Software Sources.... Click the 'Other Software' tab then untick the Ubuntu Tweak PPA.Close the software sources window and it should refresh your software index.
Uninstall any flash plugins you have installed then install ubuntu-restricted-extras. This should get flash working again.
In the future do not use PPAs unless you are certain of what you are doing. Note that Ubuntu Tweak is for users who know what they are doing and can mess up your system if you use it without precautions.