Onboarding: allow me to select "system theme" instead of light or dark

[jkjustjoshing]

What feature would you like to see?

On the "Make yourself at home" page, I have to pick light or dark mode. I have macOS set up to switch between modes at night and during the day, and I want my browser to match my system color scheme.

If this determines how the browser treats prefers-color-scheme media queries on websites, this is an even higher priority request. If websites will still honor my system setting then it's less urgent.

What platform are you seeing the problem on?

macOS

Additional context

No response

[mauro-balades]

This issue should be discussed further. You can view and continue the discussion here: #872

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