1682501 - [Apple Chip - ARM64 M1] [twitch.tv] Streams are not loaded when Firefox is running under Rosetta

Status: RESOLVED WORKSFORME

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

Description

[Timea Cernea [:tbabos][inactive]]

Affected Versions:
84.0 - Release (Open Using Rosetta)
84.0 (Intel only try-build) 20201211165338
85.0b1 - Beta (Open Using Rosetta)

Untested version:
Nightly 86.0a1 - the browser crashes if launched through Rosetta, Bug 1682510

Affected Platforms:
ARM64 MacOS:

• miniMac: MacOS Big Sur 11.0.1, Mac mini (M1, 2020), Chip: Apple M1, display 27-inch (2560x1440), with Rosetta installed

Precondition:

• Have Rosetta installed on the M1 devices
• On any universal build, such as Release 84 or Beta 85.0b1, start firefox by running it under Rosetta
• The Intel-only try build does not need any setup, this already runs under Rosetta

Steps to reproduce:

1. Go to twitch.tv and start any stream

Expected Results:
Twitch streams should be loaded.

Actual Result:
Twitch streams are not loaded when Firefox is run under Rosetta

**Severity suggestion: S1 - S2 - Twitch.tv is a top streaming platform that will not work on Intel-only builds that require Rosetta to be run.

Notes:
Please note that I do have Rosetta installed on both tested M1 devices and this does work if I run Firefox 84 universal build (Rosetta translation - false).
This is not related to the Widevine plugin, Netflix works fine under Rosetta.

Comment 1

[Haik Aftandilian [:haik]]

I am not able to reproduce on 84 running under Rosetta on the M1 MacBook Pro.

Comment 2

[Timea Cernea [:tbabos][inactive]]

Can confirm this is no longer reproducible on the affected builds running under Rosetta after the update to MacOS Big Sur 11.1.