What do you want to get out of this project? That's how you determine if its worthwhile.

I'd say yes - it seems like an interesting / worthwhile project, even if only for you to explore new areas/learn..?

Just curious, have you looked at https://browser.engineering/ - and generally speaking, what are your thoughts on the few new browsers appearing these days?

I'm a Linux user, and I use a lot of native GTK apps. I have pretty much zero interest in using a homemade rendering engine or vibe-coded Javascript runtime. Why wouldn't I use a native browser like Epiphany instead?