904
Google's New Web Environment Integrity Proposal Dismissed by Brave, Mozilla, and Vivaldi
(news.itsfoss.com)
This is a most excellent place for technology news and articles.
There aren't a lot of options for browser engines if you don't want to spend forever playing catch up while writing your own. My understanding is that Gecko, which Firefox uses, isn't as easy to build on top of. The idea with using chromium is that you can focus on building a custom ui or fancy new features without worrying about web pages rendering incorrectly.