1733461 - WebExtension API to toggle prefers-color-scheme for light/dark/system mode

Status: RESOLVED FIXED

(WebExtensions :: General, enhancement, P5)

Description

[Cimbali]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0

Steps to reproduce:

In 93, a new preference has appeared to toggle the preferred color scheme:
layout.css.prefers-color-scheme.content-override

See: https://hg.mozilla.org/integration/autoland/rev/399441fe2466

It’s not modifiable from a WebExtension currently.

Expected results:

I would be nice for this preference to be exposed through the WebExtension API. Maybe through the browser.theme that currently only exists in Firefox:

See: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/theme

I would be willing to take a look into it, given some input on whether this seems a good idea to power that be, and a pointer or 2 over where to do the changes.

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'WebExtensions::Untriaged' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Tomislav Jovanovic :zombie]

Changing severity to S5 because of patches welcome.

Comment 3

[Cimbali]

Attachment: Bug 1733461 - Add a webextension preference to override light or dark color scheme. r?mixedpuppy

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/48501517af5e
Add a webextension preference to override light or dark color scheme. r=mixedpuppy

Comment 5

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/48501517af5e

Comment 6

[Rob Wu [:robwu]]

Bug 1529323 added another supported value, so the options are now dark, light, system and browser. Please document the API in browser-compat-data and MDN.

Comment 8

[Richard Bloor]

Content to address dev-doc-needed is now available for review:

• Compatibility data PR
• Documentation PR