User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/534.52.7 (KHTML, like Gecko) Version/5.1.2 Safari/534.52.7 Steps to reproduce: I'm unable to get my "mp4" file, created on iMac, iMovie '11, to work on any version of Firefox, 9.0.1 or earlier. It works on both Safari & IE. Uploaded all files to my website where I limit movies to only those I want to see, especially when children are involved. http://www.leetaylor.net/mp4.html Actual results: It looks like it's in "loading" mode, where a small round circle is rotating. Expected results: Movie should have played. Thanks, Lee

(In reply to Lee Taylor from comment #0) > http://www.leetaylor.net/mp4.html Firefox 12 says: "No video with supported format and mime type found."