I'd be curious to know more about this. Dark Reader, at least on Firefox, is a recommended addon, which means it gets additional scrutiny by Mozilla. I do agree though that if it does additional web requests, it seems fishy. Do you have any details on where these requests go to or how you found them?
You can inspect requests yourself by either:
- Checking "Enable remote debugging" and "Enable chrome and add-on debugging toolboxes" in devtools settings, opening Browser Toolbox (Ctrl+Shift+I), and looking at the "Network" tab
or
- Enable add-on debugging and inspect the addon from `about:debugging`