[mook]

Actually, you _can_ configure uBO to block third-party content by default (by turning on advanced user mode); however, it's not as good as uMatrix as there is no split of request type (script versus image, etc.) as well as no UI to manage subdomains. You'll have to do that last part by editing the text configuration manually.

[Karunamon]

I think that's a feature now, at least in what's shipping in Chrome. You can click "custom" on any website and select the resources that site is allowed to load, by type.

UI screenshot: https://i.imgur.com/o0UsSdP.png

[smichel17]

That's noscript, not uBlock Origin, and yes, uMatrix is basically that but more convenient.

[gorhill]

> no UI to manage subdomains

You can expand any base domain to see subdomains -- click where there is no text. You can also click the "all" cell to expand to see all subdomains.