1988637 - In forced-colors mode, show a "themes disabled" warning on about:addons

Status: RESOLVED FIXED

(Toolkit :: Add-ons Manager, enhancement, P1)

Description

[Jared Hirsch [:jhirsch] (he/him) (Needinfo please)]

Once bug 1988635 lands, if a user is in forced-colors mode, they will be able to change themes in about:addons, but the browser appearance will not change.

We want to show a message to forced-colors users warning them that themes are disabled in forced-colors mode.

As with bug 1988635, the change here should be wrapped in a pref-backed Nimbus Variable in case we need to remotely disable it; we should use the same Nimbus Variable defined in bug 1988635.

Note that a message-bar was added to about:addons as part of the colorways removal work; see https://phabricator.services.mozilla.com/D243450 for details. We can reuse that message-bar to show our message.

Before engineering work can begin, we will need final content changes here from :emilyw and kbryant.

Comment 1

[Jared Hirsch [:jhirsch] (he/him) (Needinfo please)]

From :emilyw in Slack, the warning message should be: "Your Windows contrast settings are overriding Firefox themes. Turn off these settings to use themes in Firefox."

Comment 2

[Jared Hirsch [:jhirsch] (he/him) (Needinfo please)]

Attachment: Bug 1988637 - Add forced-colors notice to about:addons r?rpl

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/e262a8e00f42
https://hg.mozilla.org/integration/autoland/rev/5bf98498ee43
Add forced-colors notice to about:addons r=fluent-reviewers,bolsson,extension-reviewers,rpl

Comment 4

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/5bf98498ee43