Closed Bug 1388343 Opened 5 years ago Closed 5 years ago

[10.13] Online videos do not work if video quality is under 360p


(Core :: Widget: Cocoa, defect, P2)




Tracking Status
firefox-esr52 --- wontfix
firefox55 --- wontfix
firefox56 + wontfix
firefox57 + wontfix


(Reporter: asimonca, Unassigned)



(Whiteboard: tpi:+)


(1 file)

Attached image macos bug.png
- This bug is macOS High Sierra 10.13 specific

[Affected versions]:
- ESR 52.3.9, RC 55.0, Beta 56.0b1, Nightly 57.0a1

[Affected platforms]:
- macOS High Sierra 10.13

[Steps to reproduce]:
1. Open Firefox.
2. Go to or other video site that supports selecting video quality under 360p (e.g.
3. Open a video and select 240p or 144p.

[Expected result]:
- The video is loaded with the selected video resolution.

[Actual result]:
- The video does not work and the player displays an error message.

[Regression range]:
- This is not a regression since it only affects macOS 10.13 Beta 

[Additional notes]:
- Please see the attachments for the youtube error code.
Hello Alexandru - which seed are you testing on? A new seed was just released today.
Hello Marcia,
I've tested it on the Beta 4 (17A315i) seed. I used Public Beta 4 for this testing and the one that was released today is the Developer Beta 5. I'll get that one tomorrow and test this again.
Priority: -- → P2
Whiteboard: tpi:+
Still happens in yesterday's seed: 17A330h
I can confirm Build 17A330h 10.13, and Firefox 55 and Firefox 56 Dev edition cannot play videos from youtube and vimeo
Marcia, would you mind filing a bug with apple?
Flags: needinfo?(mozillamarcia.knous)
In the latest seed,17A352a using the latest nightly I cannot reproduce this issue - I played several youtube videos and was able to play them at both 144 and 240.
Flags: needinfo?(mozillamarcia.knous)
Hi Alexandru,
Can you help check if this issue is still reproducible with Beta56 on build 17A352a?
Flags: needinfo?(alexandru.simonca)
Just tested again on build 17A360a with Beta 56b12 and the issue is no longer reproducible.
Flags: needinfo?(alexandru.simonca)
Fixed on Apple's side, resolving this one as WFM to get it off the radar.
Closed: 5 years ago
Resolution: --- → WORKSFORME
You need to log in before you can comment on or make changes to this bug.