User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1a2pre) Gecko/20080819034536 Minefield/3.1a2pre Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1a2pre) Gecko/20080819034536 Minefield/3.1a2pre The new audio and video tags work fine for me. But in trying to get Firefox to play a raw .ogg file by setting the content type to "Use Firefox", I wound up where Firefox would open 100s of tabs. Reproducible: Always Steps to Reproduce: 1. In Tools > Options > Applications, find the application/ogg line and change it to "Use Firefox" (in the dropdown, click Use Other... and then click Firefox). 2. Now visit a file with a raw .ogg link. I tried http://en.wikibooks.org/wiki/French/Lessons/To_be and clicked the _audio_ link next to "French Dialogue". Actual Results: Firefox downloads the .ogg file and opens a new tab to show it. But I think it doesn't know what to do with the file, so it opens another tab for it. The process repeats creating hundreds of tabs until I kill the firefox.exe process. Expected Results: Ideally, FF 3.1a2 would just play the file. But at least Firefox should detect its endless loop of "open in new tab, don't know what to do with file, open in new tab..." I have several Firefox versions installed and I have several profiles (set to "Don't ask"), those could be a factor.

Dave, I think this would be better duped against bug 448603. Direct loading of .ogg would eliminate the open with.