Videos QuickTime play the sound but no picture in Firefox 4

I can't display all the video files Quicktime in Firefox 4. My Quicktime plugin is up to date. I tried in Safe Mode too and still had no luck.

I tested with trailers at Apple.com - I think they have them integrated right - and only hear sound and see the player controls. No video.

Helps if you run Firefox as a 32-bit application?

  1. Closing of Firefox
  2. Open the Applications folder in the Finder
  3. Control-click the icon of Firefox.app
  4. Select "Get Info."
  5. Check the "open in 32-bit mode".
  6. Close window "Firefox Info"
  7. Restart Firefox

Tags: Firefox

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