After checking "I am an advanced user" you will see a grid like the first image on this page when you click the more button: https://github.com/gorhill/uBlock/

After checking "I am an advanced user" you will see a grid like the first image on this page when you click the more button: https://github.com/gorhill/uBlock/wiki/Blocking-mode:-medium-mode https://github.com/gorhill/uBlock/wiki/Blocking-mode:-medium... From there you can block 3rd party scripts and frames. To save the rule you need to commit it in the "My rules" pane by clicking on the temporary rule you added.