Devtools "Audit" (Lighthouse) feature causes browser to freeze / lock up

Test plan

See https://github.com/brave/brave-core/pull/4044

Description

Feature is freezing / locking up when trying to use it.

When trying to audit a website the tool will lockup on run. This lockup also occurs when attempting to cancel it. After another cancel the tool will close then unable to run audits until the browser is relaunched.

Steps to Reproduce

1. Visit any site which uses https or use localhost.
2. Open developer tools (Rightclick and select inspect or ctrl + shift + i)
3. Navigate to the audits tab, click on run audits

Actual result:

Brave

Expected result:

Chrome

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	0.59.34 Chromium: 72.0.3626.81 (Official Build) (64-bit)
Revision	ac8b982e05014492d1bd7d317628a4f22a97ffa0-refs/branch-heads/3626@{#796}
OS	Windows

Reproducible on current release:

• Produces on all clients (Dev/Beta/Release)

Website problems only:

• Disabling Brave Shields has no effect
• Issue does not occur on the latest version of Chrome

Additional Information

• Changing any setting within the audits UI does nothing as the issue still occurs.
• Worked normally in previous version (58.21)

[bsclifton]

Fixed! Will be in our next Nightly (1.3, which is due to ship Feb 4th). We may uplift to 1.2 (Dev, shipping Jan 6th) if there’s enough support for it and if no problems are discovered 😄

[bsclifton]

@RobMaskell if you visit brave://settings/privacy, you should see a new setting Remote debugging which you can enable. Can you toggle that and then try again? You may need to restart the browser after changing it

As this isn’t obvious, I created https://github.com/brave/brave-browser/issues/7645 to track proxying this (attempting to make it safe) and enabling it by default