We initially this on in nightly in bug 1819661 but testing has gone well. The Widevine ARM plugin can be shipped via balrog as desired, but the clearkey ARM plugin needs the pref changed.

This patch ensures that Windows ARM users will use the ARM clearkey
plugin over the x86 plugin by default. We continue to ship with the x86
plugin at this time, so the users could switch back if necessary.

https://hg.mozilla.org/mozilla-central/rev/cba8b9fb276c

Comment on attachment 9321640 [details]
Bug 1820669 - Ship ARM clearkey plugin to release.

Beta/Release Uplift Approval Request

• User impact if declined: Any streaming site depending on Widevine and Clearkey plugins are broken with the x86 plugins on Windows ARM. Uplifting the requested set will allow us to roll out a switch to the ARM plugins instead.

Visiting any DRM protected streaming site will crash the plugin process, and the user will be unable to play content.

• Is this code covered by automated tests?: Yes
• Has the fix been verified in Nightly?: Yes
• Needs manual test from QE?: No
• If yes, steps to reproduce:
• List of other uplifts needed: Bug 1814910, Bug 1814703, Bug 1819661, Bug 1814703, Bug 1819410
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): Low risk because we have verified this in 112 in both nightly and beta with no issues reported by QA. GMP plugins are already completely broken for Windows ARM users.
• String changes made/needed:
• Is Android affected?: No

ESR Uplift Approval Request

• If this is not a sec:{high,crit} bug, please state case for ESR consideration: Any streaming site depending on Widevine and Clearkey plugins are broken with the x86 plugins on Windows ARM. Uplifting the requested set will allow us to roll out a switch to the ARM plugins instead.
• User impact if declined: Visiting any DRM protected streaming site will crash the plugin process, and the user will be unable to play content.
• Fix Landed on Version: 112
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): Low risk because we have verified this in 112 in both nightly and beta with no issues reported by QA. GMP plugins are already completely broken for Windows ARM users.

Depends on:
Bug 1814910, Bug 1814703, Bug 1819661, Bug 1814703, Bug 1819410, Bug 1811981

Comment on attachment 9321640 [details]
Bug 1820669 - Ship ARM clearkey plugin to release.

Approved for 102.10esr

https://hg.mozilla.org/releases/mozilla-esr102/rev/ddf0ebeb3636

Comment on attachment 9321640 [details]
Bug 1820669 - Ship ARM clearkey plugin to release.

Approved for 111.0.1

https://hg.mozilla.org/releases/mozilla-release/rev/1a3de34b0fa3