Exactly. My rant was lopsided, but to be more accurate: The browser should facilitate the communication between the author and the reader of the page, and not contaminate it.

All these features are great. They just need to be made explicit and obvious. Inferring what anyone wants let alone overriding what they said they wanted should just be a standard no no.

The best thing a browser could do for the author and the reader would be to explicitly say why something is broken and how to fix it. For example, "X is broken because of extension Y".

Browsers already have great analysis tools but there could be one more FYI breakdown where the browser would just tell you what it knows about any conflicts or issues it sees, and provide options. Something designed for the average user, but that could be extremely useful for authors also by providing a simple list of issues the browser sees about their page -- from an objective, browser POV. Input is always valuable. Acting on it without permission, not so much.