1861328 - Make it clear the colour scheme toggles do not work when `privacy.resistFingerprinting` is enabled

Status: VERIFIED FIXED

(DevTools :: Inspector, defect, P3)

Description

[:glob ✱]

Steps to reproduce

1. Set privacy.resistFingerprinting to true
2. On a website that honours dark/light schemes, such as Bugzilla, use the Inspector's buttons to toggle dark mode

Actual

• Nothing

Expected

Either:

• A message indicating that privacy.resistFingerprinting is preventing the action from completing successfully
  or
• The buttons should be disabled, with a tooltip indicating that they are disabled due to privacy.resistFingerprinting

Comment 1

[Jan Honza Odvarko [:Honza] (always need-info? me)]

Thank you for the report Glob!

I can easily reproduce it on my machine (Win11)

Comment 2

[Fatih Kilic [:fklc]]

Attachment: Bug 1861328: Disable color mode simulation if RFPTarget::CSSPrefersColorScheme is enabled. r?tjr

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/2e15fc9ac538
Disable color mode simulation if RFPTarget::CSSPrefersColorScheme is enabled. r=tjr,devtools-backward-compat-reviewers,devtools-reviewers,ochameau

Comment 4

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/2e15fc9ac538

Comment 5

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

Reproducible on a 2024-09-19 Nightly build on Windows 10.
Issue is verified as fixed on Firefox 132.0b2 and Firefox Nightly 133.0a1 on Windows 10, Ubuntu 22, macOS 14.