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.

Avatar for Username

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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Firefox will only play YouTube videos up to 720, how to fix?

  • 2 àwọn èsì
  • 10 ní àwọn ìṣòro yìí
  • 9 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ cor-el

lmnopotts
lmnopotts
more options

This afternoon I watched an old video of mine on YouTube. Afterwards, YouTube now only gives the option of 360 or 720p playback. Internet Explorer will play the same videos at 4K, and I was able to watch 1080 up to 2160p before watching this old video, how do I fix Firefox?

http://youtu.be/Je0sQwVynzI There's the newest video, with a 4k playback option, I don't want to post the old video that caused the glitch but it's the first video in my channel.

Please help!

This afternoon I watched an old video of mine on YouTube. Afterwards, YouTube now only gives the option of 360 or 720p playback. Internet Explorer will play the same videos at 4K, and I was able to watch 1080 up to 2160p before watching this old video, how do I fix Firefox? http://youtu.be/Je0sQwVynzI There's the newest video, with a 4k playback option, I don't want to post the old video that caused the glitch but it's the first video in my channel. Please help!

All Replies (2)

lmnopotts
lmnopotts Ìbéèrè olóhun
more options

After going into about:config I did 2 things:

media.mediasource.enabled set to True

then added

Right-click and select New > Boolean Name preference media.mediasource.ignore_codecs Set value to True

A ton of technical stuff just from playing an old video! Is there a simpler to fix this without hard setting things in the configuration?

And now I cannot replay youtube videos! It will pause if I try to go back. Considering a video will auto play so I will select the highest quality then scrub back to start this happens usually every time so this fix is worthless.

Ti ṣàtúnṣe nípa lmnopotts

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

This extension allows to switch between the Flash player and the HTML5 media player on the YouTube website. YouTube Flash Video Player: