Arch Linux

frumble

Member

From: Germany

Registered: 2012-05-20

Posts: 162

Website

[SOLVED] Firefox 123 cannot play mp3s

Hey,
just noticed that the newly released Firefox 123 cannot play mp3s anymore on my system. Asked the fediverse and someone on Arch told me his Firefox 123 still can play them. Super strange. Bug or broken config?

Last edited by frumble (2024-02-22 20:01:23)

mpan

Member

Registered: 2012-08-01

Posts: 1,367

Website

Re: [SOLVED] Firefox 123 cannot play mp3s

“Works here”. Firefox MP3 support is also claimed by Mozilla.

See if it’s not a matter of some addon blocking the playback.

If not, try with a fresh profile and see, if the problem persist.

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Sometimes I seem a bit harsh — don’t get offended too easily!

seth

Member

Registered: 2012-09-03

Posts: 60,828

Re: [SOLVED] Firefox 123 cannot play mp3s

Can you still play other audio codecs?
Can you "ffplay thunderstruck.mp3"?
Downgrading FF alone "fixes" it?

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frumble

Member

From: Germany

Registered: 2012-05-20

Posts: 162

Website

Re: [SOLVED] Firefox 123 cannot play mp3s

Interesting, works in another profile!
Yes, other codecs still work, e.g. YouTube with Opus and VP9.

Now found this error when starting Firefox with my main profile:

[Child 15045, MediaDecoderStateMachine #1] WARNING: Decoder=7b8ab5d86000 Decode error: NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005) - Error no decoder found for audio/mpeg: file /usr/src/debug/firefox/firefox-123.0/dom/media/MediaDecoderStateMachineBase.cpp:166 

Doesn’t sound to me like an Add-On problem?

seth

Member

Registered: 2012-09-03

Posts: 60,828

Re: [SOLVED] Firefox 123 cannot play mp3s

https://support.mozilla.org/en-US/quest … er-1595973 ?

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

frumble

Member

From: Germany

Registered: 2012-05-20

Posts: 162

Website

Re: [SOLVED] Firefox 123 cannot play mp3s

Solved! It was "media.ffvpx.enabled" which I had set to disabled. This was recommended for video hardware decoding for a long time but now videos still seem to be GPU decoded when this is enabled (4K 60 fps on YT at around ~3% CPU), and mp3s are working again.
Thanks!

trinitronx

Member

Registered: 2023-06-27

Posts: 1

Re: [SOLVED] Firefox 123 cannot play mp3s

Solved! It was "media.ffvpx.enabled" which I had set to disabled. This was recommended for video hardware decoding for a long time but now videos still seem to be GPU decoded when this is enabled (4K 60 fps on YT at around ~3% CPU), and mp3s are working again.
Thanks!

Can confirm this solved the issue on my system also.

A few quick ways to check for this issue:

• Test playing audio/mpeg via BandCamp or SoundCloud

• Compare results of OpenSuse's HTML5 test page with media.ffvpx.enabled set to true vs. false (specifically: MP3 support under Audio section)

  • https://html5test.opensuse.org/

Last edited by trinitronx (2024-02-26 18:45:56)

old1231sameasone

Member

Registered: 2024-02-29

Posts: 1

Re: [SOLVED] Firefox 123 cannot play mp3s

After update to Firefox 123 I got same problem. Browser console says "HTTP “Content-Type” of “audio/mpeg” is not supported. Load of media resource failed".

I changed media.ffvpx.enabled to true (default value) and this fixed the issue.

Thank you for your help.

aocab

Member

Registered: 2013-08-15

Posts: 33

Re: [SOLVED] Firefox 123 cannot play mp3s

Thanks for the info.
Had not noticed a problem until I tried playing a soundcloud track.
Tracks would not even work in Firefox's troubleshoot mode.
This thread popped up in a google search and I checked my setting for media.ffvpx.enabled and it was set to false.
I don't recall ever changing it but soundcloud audio started working again setting it back to true.

mpan

Member

Registered: 2012-08-01

Posts: 1,367

Website

Re: [SOLVED] Firefox 123 cannot play mp3s

If anybody encounters the same problem in the future and uses Firefox 125 or later, note: frumble found is likely not a solution to your problem (unless confirmed to be the case) and may impact hardware decoding of VP8 and VP9.

This was a particular issue affecting Firefox starting⁽¹⁾ at 123 and is going to be fixed in 125.⁽²⁾
____
⁽¹⁾ Firefox 123: Wave, FLAC, Vorbis, Opus, MP3 are no longer available (Bug 1881298)
⁽²⁾ opus audio not playing on linux (if media.ffvpx.enabled has been manually disabled. …) (Bug 1878503)

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Sometimes I seem a bit harsh — don’t get offended too easily!