Comment 108 for bug 263435

Here's a good example I found today:
http://media.putfile.com/Family-Guy-Does-Penut-Butter-Jelly-Time

Simply interact with the media control somehow (click play or stop). Then try a FireFox command (Ctrl+T or Ctrl+D), and it will fail. You can reactivate it by focusing back on the html or on a different tab.