Browser defaults to light mode even when the system prefers light mode

[everypizza1]

Captchas

• [X] I have read the instructions.
• [X] I have searched existing issues and avoided creating duplicates.
• [X] I am not filing an enhancement request.

What happened?

I launched the browser on a new profile and saw a dark theme intro page, even though my system has dark mode off. Note that light mode is an accessibility feature. Screenshot:

Reproducible?

• [X] I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

1.0.1-a.22

What platform are you seeing the problem on?

Linux

Relevant log output

No response

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