Websites changing scrolling behavior is so infuriating to me that I've considered doing my own Firefox builds that remove the JavaScript functions for changing

Websites changing scrolling behavior is so infuriating to me that I've considered doing my own Firefox builds that remove the JavaScript functions for changing the scroll position. I can't for the life of me figure out why web devs think they need to re-implement smooth scrolling. Web browsers already do it out of the box, and trying to re-implement it never works in all browsers.