Brave extension injecting script into page it doesn't have permissions for

[jonathanKingston]

Description

The Brave extension is causing console errors due to attempting to inject a script into pages that aren't permitted based on manifest restrictions.

Steps to Reproduce

1. Go to brave://inspect
2. Open the console for the background page
3. Open a new tab

Actual result:

Unchecked runtime.lastError: Cannot access contents of url "chrome://newtab/". Extension manifest must request permission to access this host.

Expected result:

No console error thrown

Reproduces how often:

Always

Brave version (brave://version info)

Latest compiled build