1808430 - Unable to separate system theme and browser theme for website appearance in FF106

Status: RESOLVED WONTFIX

(Firefox :: Settings UI, defect)

Description

[awu]

Bug 1529323 introduced the ability to separate browser theme and system theme for website appearance using layout.css.prefers-color-scheme.content-override.

Bug 1788822 removed this ability in FF106.

I previously used layout.css.prefers-color-scheme.content-override = system, with the dark FF theme, to have website appearance follow the system theme but FF have a dark theme.

With the change in Bug 1788822 this is no longer possible as setting the browser theme to Dark in about:addons and setting Website appearance in about:preferences to Auto forces a Dark website appearance. Instead, I have to set the browser theme to system theme which is a regression because I explicitly want them separate.

Please restore the option to separate the two in layout.css.prefers-color-scheme.content-override.

I pulled the product and component from Bug 1529323 where the option was first introduced.

Comment 1

[Emilio Cobos Álvarez (:emilio)]

This was an intentional change in bug 1788822. It's more a UI change than a limitation, and I knew somebody would object, but it was an intentional simplification.

Comment 2

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

Set release status flags based on info from the regressing bug 1788822

:dao, since you are the author of the regressor, bug 1788822, could you take a look? Also, could you set the severity field?

For more information, please visit auto_nag documentation.

Comment 3

[:Gijs (he/him)]

You can still manually choose the content scheme to dark/light (rather than following the browser theme). As comment #1 said, this was an intentional change, so I don't think we should revert this. If you want integration with something that automatically changes based on the system theme you could use/write an extension to that effect.