This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

Video H.264 not playback

  • 6 biyano
  • 1 eza na nkokoso oyo
  • 2 views
  • Eyano yasuka ya Vasya8

more options

I have problem with play video on some site (example yapfiles.ru or smotri.com). But on youtube I have no any problems. I use Windows XP SP3 32bit I need install some plugin or change some setting? Or maybe playback H.264 not work in WinXP?

I have problem with play video on some site (example yapfiles.ru or smotri.com). But on youtube I have no any problems. I use Windows XP SP3 32bit I need install some plugin or change some setting? Or maybe playback H.264 not work in WinXP?
Bafoto sur écran jointes

All Replies (6)

more options

Will this fix ya up : https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

Maybe you should move to the Extended Release as you will not get any further updates from Firefox 52 running XP https://www.mozilla.org/en-US/firefox/organizations/all/

Please let us know if this solved your issue or if need further assistance.

more options

Misunderstanding as info shows just Firefox 52 when it usually includes the ESR after the number.

Ezalaki modifié na Shadow110

more options

I mean I already use Firefox 52.2.1ESR and have this problem.

more options

Firefox relies on built-in OS support to play (MP4) media files via the HTML5 media player. On the Windows XP platform you do not have native support for playing MP4 files with the HTML5 media player.

You can try if the solution listed here still works for you. https://www.msfn.org/board/topic/175591-enable-mp4-h264-aac-html5-video-in-firefox-on-windows-xp-without-flash/

Please let us know if this solved your issue or if need further assistance.

more options

I try this but Primetime plugin is not update