My main browser has been Waterfox which I update manually, which doubly insulated me from this. But don't misunderstand...I hate pretty much all browsers now, too.
Webassembly engine is one of the simpler things to implement in a browser. It's essentially a giant switch statement in a loop.
> let alone the rest?
But who said a new browser has to implement everything from scratch? Why couldn't a browser use well established libraries for things like image decoding, webasm, JavaScript, font rendering, webrtc, http, etc?