isn't ublock's filtering compiled to webassembly?

From my unprofessional glance ar their repository, it uses a little, but not much. Take a look at their code; all or most of the filtering is done in JavaScript, the webassembly appears to be just one two modules. (It's in the "wasm" folder near the top of the list).

(Edit: I was looking at outdated code; the newer version uses more, but IMO pales in comparison to the JavaScript filtering logic)

seems a bit dangerous though to risk for a browser with so small market share

Waterfox has a much smaller market share and much smaller budget, and was able to clear this with search partners just by promising not to block ads on them by default.

Rust is faster than JavaScript

isn't ublock's filtering compiled to webassembly?

The slow thing usually is the DOM manipulation anyways.

seems a bit dangerous though to risk for a browser with so small market share

They should have built it in years ago, but called it "web security filtering" or something and included only a basic security blocklist, but left it easy to add other lists.

especially using a brave adblocker, which i noticed doesnt block most ads, and likely whitelists some of them.