The on/off switch is global which is not ideal, it should be site-based. Editing the Include/exclude list is too much work, it should be done automatically via the main switch.
The settings are available from the 3-dot menu next to the addon toggle in the Addon page (Cmd+Shift+A). They're not straight forward though.
The Dark styles should be more easily accessible from the main addon button, and they should be editable.
"Dark mode simple 1" seems to work better than the default mode but if only there was a way to edit the background color to 10% brightness (dark grey).
