When you enable "Developer mode" in the "Extensions" page of your browser, you can open the developer tools for the extension by clicking the "service worker" link, and from there select the "Network" tab, you will be able all the network requests made by the extension from within its service worker.
I just started using uBO Lite on Chrome. Brave is my daily driver and I just can't surf the web without an ad blocker anymore. I resisted it for years.
Thanks gorhill. Yes, this is true! Osprey only sends its stripped-down URLs to the services you turn on. Nothing more. It's as anonymous as it can be without using a VPN, afaik.