Note that ublock.org is not Raymond Hill's ublock origin [1]. (Edit: then parent comment was edited the point to gorhill's mv3 chrome extension.)

Here is ublock origin's experimental mv3 version with detailed notes on limitations: [2] [3]

[1] https://ublockorigin.com/

[3] https://github.com/gorhill/uBlock/commit/a559f5f2715c58fea4d...

[2] https://news.ycombinator.com/item?id=32754274