The W3C (The body that dictates web standards) specification, that describes what browser engines should handle, like CSS features, HTML5 etc and how is equivalent to thousands of pages long and there are huge standards to implement.

HTML5 is a big thing to implement, so is CSS and the JavaScript engine and probably even more technologies I’m forgetting

And that’s just implementation, it takes even more work to get them running well enough for the average end-user

Ladybird has been working on their from scratch engine for ~5 years iirc and they’re not planning to even have the first alpha out until next year lol

It’s a monumental effort really, building a browser engine from scratch and taking it to daily driver usable is probably among the most difficult programming challenges. It’s way easier to build a new Linux kernel from scratch than a browser engine lmao

Even Microshit tried and gave up because it was so hard

This would probably be a better fit for !yepowertrippinbastards@lemmy.dbzer0.com