I've created chrome extension for better productivity using
It is indeed hard to find official statements.
Canonical question regarding CWS scripting:
Chrome Extension Content Script on https://chrome.google.com/webstore/
As wOxxOm mentions,
https://chrome.google.com/webstore/* is the only website exception.
Canonical question on
Can you access chrome:// pages from an extension?
This is also reflected in the documentation:
"<all_urls>" only allows "any URL that uses a permitted scheme",
chrome:// not being one of the permitted schemes.
Edit: found a nice summary I made earlier.
It's highly unlikely that you would be granted a whitelist for either of those.
APIs that require whitelisting are dangerous, and we try to avoid them as much as possible.[source]