[IIIIIIIIIIII]

Your question has been answered already, I'd just like to point out there is a second "advanced" mode in uBlock Origin: Basically, you disable loading of everything by default and a click on the icon shows you what servers the page tried to load stuff from. Then you can enable them on a case by case basis, temporarily or add your selection as a new permanent rule.

This is independent of and in addition to the lists, they are always used. It gives you much greater control. What I do is first load the page with everything disabled, then I enable piece by piece until I get enough of the page working. Most of the time it's obvious, for example when there is a big white space on the page where you expect a video to be and you see that youtube.com was blocked you know they tried to show an embedded Youtube video. If you want to see it you enable that domain and the page refreshes. Etc.

I used the default mode of just the lists for most of my life, but now I can't imagine my life without the advanced mode. (As a Chrome user) I don't miss NoScript any more (yes I know that does even more).