Unfortunately Chrome doesn't granularize it any further. Basically all it needs to do is inject some CSS, and in Chrome permission-speak that is covered under the umbrella of "read and change all your data".
The source is however available so you could inspect it for yourself and install from source:
dheera|5 years ago
The source is however available so you could inspect it for yourself and install from source:
https://github.com/darkreader/darkreader
Reelin|5 years ago
Actually I believe the default mode analyzes the page contents in an attempt to provide a better end result.
ffpip|5 years ago
It doesn't collect anything, is verified/checked by Mozilla
https://darkreader.org/privacy/