1902893 - Widevine not working even if installed

Status: RESOLVED FIXED

(Core :: Audio/Video: GMP, defect)

Description

[Sonofapo]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Steps to reproduce:

1. Start Firefox (version 129.0a1 as of 15/06/2024, Windows 11)
2. Go to any site that requires DRM (primevideo, for example)

Actual results:

The site returns an error about DRM not being active even if Widevine plugin is installed and updated.

The issue occurs since the last 2 nightly updates at the time of this report. Going to https://bitmovin.com/demos/drm indicates Widevine plugin is not active.

I had a laptop not updated to the same Firefox Nightly build. Out of curiosity i first tested Widevine before to update and it was working. Then I installed the last updated and Widevine stopped working.

I created a new profile without any modification to exclude my customizations but the issue is still present.

Expected results:

No DRM error should be prompted and the media content should play without issues.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: GMP' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Mayank Bansal]

Can confirm

Bisection:
Bug 1900175: Enable USER_RESTRICTED for content processes on Nightly. r=handyman

Differential Revision: https://phabricator.services.mozilla.com/D213259

Comment 3

[Mayank Bansal]

Can confirm that setting security.sandbox.content.level=7 fixes this issue.
Profile with the "debug" preset: https://share.firefox.dev/3XwKrEe

Comment 4

[Mayank Bansal]

Attachment: about:support

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

:bobowen, since you are the author of the regressor, bug 1900175, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 6

[Bob Owen (:bobowen)]

Sonofapo - thanks for taking the time to report this.
I have a potential fix, but I've asked for bug 1900175 to be backed out for the moment.

Comment 7

[Bob Owen (:bobowen)]

This should be working in the latest Nightly now.

Comment 8

[Sonofapo]

(In reply to Bob Owen (:bobowen) from comment #7)

This should be working in the latest Nightly now.

I can confirm that