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Google Chrome’s plan to limit ad blocking extensions kicks off next week
(arstechnica.com)
This is a most excellent place for technology news and articles.
It's about browser architecture and not silly names ("Safari", "Firefox", "Chrome"). The point is that there are only two actual variants.
Not when you have to make a web app render identically in them, which is what the OP was about.
No, you still have three rendering engines. WebKit and Blink are different. Since the second is an (old) fork of the other one, they are similar but far from being the same. They are pages that work in one but not the other, even if you change the user agent.
That's...not true at all.