Maybe they just don't know any better
firefox is debataable
Name a better open source browser built from the ground up that isn’t backed by big tech, I’ll wait.

Ladybird is on the horizon.

Also Firefox isn’t built from the ground up I don’t believe. It’s based on Gecko which iirc was based on KHTML. idk i can’t fully remember don’t take this as fact. i use firefox and prefer it to chomium based browsers but Mozilla has been making really weird moves lately around AI that I think is very unnecessary.

Ladybird is also making weird moves around AI and I feel obligated to mention fascism
Ladybird adopts Rust, with help from AI - Ladybird

We're adopting Rust as our C++ successor language, and using AI agents to accelerate the transition.

Ladybird is not becoming vibe-coded, the AI generated code is being tested and refactored all the time, it’s not straight up slop like what most junior devs do now.