(Resolved) Firefox 57 doesn't play YouTube videos

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Le1
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(Resolved) Firefox 57 doesn't play YouTube videos

Post by Le1 »

New Firefox Quantum doesn't play YouTube videos. It pops a message: your browser doesn't recognize the HTML5 format.

Thank you for replays. It was a faulty add-on. Problem solved.
Last edited by Le1 on November 25th, 2017, 3:44 am, edited 1 time in total.
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DanRaisch
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Re: Firefox 57 doesn't play YouTube videos

Post by DanRaisch »

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Happy112
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Re: Firefox 57 doesn't play YouTube videos

Post by Happy112 »

In addition to the above :

In case you have any (YouYube) video related add-ons :

Would you please disable them and see if that will make a difference ?
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RobertJ
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Re: Firefox 57 doesn't play YouTube videos

Post by RobertJ »

.
FF57 plays YouTube videos for me using the native HTML5 player. Any particular video URL?

.
FF 92.0 - TB 78.13 - Mac OSX 10.13.6
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8-bit
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Re: Firefox 57 doesn't play YouTube videos

Post by 8-bit »

Le1 wrote:New Firefox Quantum doesn't play YouTube videos. It pops a message: your browser doesn't recognize the HTML5 format.
Try going into preferences and disabling hardware acceleration (General > Performance). I believe this has worked - saw it in another thread. Lemme know.
choi_choi
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Re: Firefox 57 doesn't play YouTube videos

Post by choi_choi »

I have a similar problem -- some "live" videos aren't loading. Sky News and Bloomberg for examples:
https://www.youtube.com/watch?v=XOacA3RYrXk
https://www.youtube.com/watch?v=Ga3maNZ0x0w
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RobertJ
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Re: Firefox 57 doesn't play YouTube videos

Post by RobertJ »

.
Both of those work for me. I had to click the play arrow in the lower left, the large one in the middle did nothing.

.
FF 92.0 - TB 78.13 - Mac OSX 10.13.6
toolong
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Re: Firefox 57 doesn't play YouTube videos

Post by toolong »

RobertJ wrote:.
Both of those work for me. I had to click the play arrow in the lower left, the large one in the middle did nothing.

.

Same/similar for me.
ZanePhalen
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Joined: January 29th, 2015, 12:24 pm

Re: Firefox 57 doesn't play YouTube videos

Post by ZanePhalen »

I also can't get videos to play on youtube anymore. However, what I am seeing is the interface loading but the video does not load. Instead all I get is the circular line that keeps on going around and around. This just happened this afternoon. Yesterday, or a couple of days ago, everything worked fine. I've change nothing since upgrading to Ver. 57 (now Ver 58.0b6, 64 bit). I am not getting any error messages.

I briefly reverted to an older version of Firefox and the videos played just fine. Then I went ahead and upgraded again, videos would not work.

I did read the suggested fixes and articles in this post but I still can't put my finger on the problem. None of the solutions seem to fit my particular problem.
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8-bit
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Re: Firefox 57 doesn't play YouTube videos

Post by 8-bit »

Just to double check, go to about:config and check these two prefs:

media peerconnection.enabled - TRUE
media.peerconnection.video.enabled - TRUE

A little obscure, but best to check just in case.... If they aren't true you will get the YouTube continuous spinning circle but the video never plays....
elist74
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Re: Firefox 57 doesn't play YouTube videos

Post by elist74 »

check also if media.autoplay.enabled is set to false "True" is the default

If you have a flash/html5 switcher, it have to be set at Html5

edits: "True" is the default
ZanePhalen
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Re: Firefox 57 doesn't play YouTube videos

Post by ZanePhalen »

Update:

Looks like my problem was caused by not checking the correct elements via the new version of Noscript. Once I did that everything is back to normal.
Last edited by DanRaisch on November 25th, 2017, 5:11 am, edited 1 time in total.
Reason: "Resolved" added to subject per OP's most recent update.
bam80
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Joined: November 27th, 2017, 4:55 am

Re: Firefox 57 doesn't play YouTube videos

Post by bam80 »

ZanePhalen wrote:I also can't get videos to play on youtube anymore. However, what I am seeing is the interface loading but the video does not load. Instead all I get is the circular line that keeps on going around and around. This just happened this afternoon. Yesterday, or a couple of days ago, everything worked fine. I've change nothing since upgrading to Ver. 57 (now Ver 58.0b6, 64 bit). I am not getting any error messages.
Have the same behaviour - can see video frame by frame by moving the spinner, but can't start the video - the circular line just spinning around.
Reset Settings, Safe Mode, turning of HW Accel didn't help.
Don't know what to try else.. ](*,)
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therube
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Re: (Resolved) Firefox 57 doesn't play YouTube videos

Post by therube »

As a test, create a new, clean Profile, then load your video.
What happens?
Fire 750, bring back 250.
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.19) Gecko/20110420 SeaMonkey/2.0.14 Pinball CopyURL+ FetchTextURL FlashGot NoScript
bam80
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Joined: November 27th, 2017, 4:55 am

Re: (Resolved) Firefox 57 doesn't play YouTube videos

Post by bam80 »

therube wrote:As a test, create a new, clean Profile, then load your video.
What happens?
Hi therube,
just removed .mozilla folder - no changes. Video still hangs.
PS: restarted browser of course.
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