Impossible to disassociate browser theme from devtools theme

[L0v3l4c3]

Description

Since today's stable channel release (2021-11-16) it is impossible to disassociate the developer tools theme from the browser theme.

Steps to Reproduce

1. Set the browser theme as "Dark".
2. Open developer tools, change the developer tools theme to "Light".
3. Reload the developer tools.

Actual result:

The developer tools theme will remain "Dark".

Expected result:

The developer tools theme should be "Light".

Reproduces how often:

Always, regardless of the chosen developer tools theme, it will always use the browser's theme instead.

Brave version (brave://version info)

Brave | 1.32.106 Chromium: 96.0.4664.45 (Official Build) (64-bit)
Revision | 76e4c1bb2ab4671b8beba3444e61c0f17584b2fc-refs/branch-heads/4664@{#947}
OS | Windows 10 Version 21H1 (Build 19043.1288)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the nightly channel? Have not tried

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? No
• Does the issue resolve itself when disabling Brave Rewards? No
• Is the issue reproducible on the latest version of Chrome? I do not know

[arfmach]

The same occurs with the inverse color scheme: browser with light theme, devtools with dark theme - devtools restarts with light theme.

[jondcallahan]

Chiming in to add that I am seeing this in Brave also, and that it is not reproducible in current Chrome

[bsclifton]

Should be fixed with brave/brave-core#12600 - duplicate of #20491

Fix is in Nightly and will be uplifted to Beta and Release channels. Thanks for your patience, folks 😄