Ce site disposera de fonctionnalités limitées pendant que nous effectuons des opérations de maintenance en vue de vous proposer un meilleur service. Si un article ne règle pas votre problème et que vous souhaitez poser une question, notre communauté d’assistance est prête à vous répondre via @FirefoxSupport sur Twitter, et /r/firefox sur Reddit.

Rechercher dans l’assistance

Évitez les escroqueries à l’assistance. Nous ne vous demanderons jamais d’appeler ou d’envoyer un SMS à un numéro de téléphone ou de partager des informations personnelles. Veuillez signaler toute activité suspecte en utilisant l’option « Signaler un abus ».

En savoir plus

Low framerate when watching Youtube videos on HTML5 in fullscreen

  • 11 réponses
  • 207 ont ce problème
  • 1 vue
  • Dernière réponse par Julian Lai

more options

Ever since Firefox made Youtube videos only play in HTML5, no matter what quality setting I have on the video I'm watching, when I view the video on fullscreen it has low framerate. This problem does not happen with other video sites that uses Flash, like Twitch, Blip, or Dailymotion.

Is it software related to the browser or hardware related with it being HTML5?

Ever since Firefox made Youtube videos only play in HTML5, no matter what quality setting I have on the video I'm watching, when I view the video on fullscreen it has low framerate. This problem does not happen with other video sites that uses Flash, like Twitch, Blip, or Dailymotion. Is it software related to the browser or hardware related with it being HTML5?

Solution choisie

Check for updates for your graphics using the above.

Lire cette réponse dans son contexte 👍 0

Toutes les réponses (11)

more options

If you have problems with current Shockwave Flash plugin versions then check this:

  • see if there are updates for your graphics drive drivers

https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

  • disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

  • disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also:

more options

As stated, I am currently not experiencing problems with Flash players. Just the HTML5 one that Youtube is using.

more options

Solution choisie

Check for updates for your graphics using the above.

more options

My graphic drivers currently has the latest updates installed to them. I'm using Geforce Experience to look for and install the latest drivers for my graphics card.

Disabling protected mode didn't solve it, since it's not Flash that I'm having problems with.

I can't choose to disable hardware acceleration, since those instructions are for Flash, and there is no such option for HTML5 as far as I know.

more options

You can try to disable hardware acceleration in Firefox.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

more options

I have it already disabled, to solve a previous issue I had. https://support.mozilla.org/en-US/questions/1059207

more options

I found what the problem was. On the quality settings for each Youtube video, whenever I have "Auto" on, and try watching it fullscreen, then it has low framerate.

But when I manually select the quality, and fullscreen it, then it's just as good as not having it fullscreen.

more options

Okay, it's only with bad framerate when the quality is anything but 1080p. But when it's 1080p, there is no problem with it.

more options

I'm still having the same problems, not only with Youtube, but also with Twitch switching over from Flash to HTML5. Except on Twitch, the framerate is consistently low, and sometimes stutters.

more options

Hey, i' ve had the same problem when youtube changed to HTML5. I've found this solution working: go to about:config, then find the option media.webm.intel_decoder.enabled and set it to true. I have no clue what is that option and why is it disabled by default, but it worked.

more options

cepir said

Hey, i' ve had the same problem when youtube changed to HTML5. I've found this solution working: go to about:config, then find the option media.webm.intel_decoder.enabled and set it to true. I have no clue what is that option and why is it disabled by default, but it worked.

I don't have this option.