Videos from many different sources will stop playing well before the end; this is true on Firefox 3.6.28 and 22.0.
When I play and try to download videos from YouTube and other sources, the videos stop playing anywhere from a few seconds after starting up to about a third of the length of the video. Occasionally, the video will play through to the end, but neither ant nor downloader will work. I have Firefox 3.6.28 on my old Mac G5 (OS 10.4.11), and on my new MacMini running Firefox 22.0 and up to about 10 days ago, the 3.6.28 worked fine (I hadn't started using the MacMini at that time). The G5 Firefox loads sites slowly, but that's to be expected, considering its "age".
ყველა პასუხი (1)
YouTube regularly makes changes to its websites that causes programs and Firefox extensions that download file to get broken. In such a case those extensions need to be updated to start working again and until then you can't save files.
You should be able to play those videos without a problem.
If not then start Firefox in Safe Mode to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions).
- Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.