Open Bug 1904027 Opened 3 months ago Updated 5 days ago

Autoplay does not work on vimeo.com

Categories

(Web Compatibility :: Site Reports, defect, P2)

Product:
Web Compatibility
Component:
Site Reports
Version:
Firefox 129
Platform:
Desktop
Windows 10
Type:
defect

Tracking

(firefox127 affected, firefox129 affected)

Tracking Flags:
Tracking Status
firefox127 --- affected
firefox129 --- affected

People

(Reporter: ctanase, Unassigned)

References

(
URL
)

Details

(Keywords: webcompat:needs-diagnosis)

User Story

platform:windows,mac,linux
impact:feature-broken
configuration:general
affects:all
diagnosis-team:media

Attachments

(1 file)

FF vs Chrome vimeo.mp4
2.14 MB, video/mp4
Details
Attached video FF vs Chrome vimeo.mp4 —

Environment:
Operating system: Windows 10
Firefox version: Nightly 129.0a1 (2024-06-20)

Preconditions:
• make sure "autoplay" is enabled (it should be enabled by default)
• Clean profile

Steps to reproduce:

  1. Go to https://vimeo.com/33698814
  2. Play the video.
  3. Wait until it ends.
  4. Observe the behavior.

Expected Behavior:
Thumbnail of the upcoming video is displayed on the right side of the current video.

Actual Behavior:
Nothing happens, the video appears as it did not end. Pause button is still active.

Notes:

  1. Screenrec attached
  2. Reproducible regardless of the ETP status
  3. Reproducible on Firefox Release as well
  4. Not reproducible on Chrome
  5. Issue found during WebCompat team [Top100] websites testing
Severity: -- → S3
User Story: (updated)
Keywords: webcompat:needs-diagnosis
Priority: -- → P2

This issue is caused by Vimeo, they didn't call endOfStream() properly, so that Firefox is still waiting more data which would never come. I will report this issue to them.

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