Option to Use Custom DevTools Stylesheets Missing

[8thHalfHour]

Description

As of the latest version (v1.74.1 Chromium: 131.0.6778.24 (Official Build) beta (arm64)), the option to use a custom stylesheet in DevTools is no longer available. I also cannot find anything within Brave that replaces it with the same functionality. I use this feature constantly in my work for improved accessibility.

Steps to reproduce

1. Open DevTools (F12) > Settings > Experiments.
2. Search for style.
3. Allow extensions to load custom stylesheets is not in the list.

Actual result

The option is not present.

Expected result

The option is present, as they are still there in Chrome (v130.0.6723.92 (Official Build) (arm64)):

Reproduces how often

Easily reproduced

Brave version (brave://version info)

Brave: 1.74.1 Chromium: 131.0.6778.24 (Official Build) beta (arm64)
Revision: a8e7367d8022295ca5d3b1bb35475274a22a472a
OS: macOS Version 14.7 (Build 23H124)

Channel information

• release (stable)
• beta
• nightly <-- did not test

Reproducibility

• with Brave Shields disabled
• with Brave Rewards disabled
• in the latest version of Chrome <-- the "expected result" screenshot is from the current version of Chrome

Miscellaneous information

No response