User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 Build Identifier: Mozilla/5.0 (X11; U; Linux armv7l; en-US; rv:1.9.2) Gecko/20100107 On my Nokia N900, I tried watching the video on the mozilla blog announcing Firefox 3.6. Even after the entire video loaded, the video would just play back in short spurts of sound, and change the display every two seconds (as opposed to 30 times a second). Reproducible: Always Steps to Reproduce: 1.Visit a page with native video on the Nokia N900 2. 3. Actual Results: Notice the incredible slowness in playback. Expected Results: Video plays back smoothly. I am running the 'PR1.1' version, also known as 2.2009.51-1.002 (I think the last part is just my locale)
We are working on improving this. First stage is in bug 538323.
It is safe to assume that a problem with the N900 isn't going to get fixed.