Many password managers use a “save new” or “update” login credentials feature that watches for newly used passwords and asks if you’d like to save the credentials used.
That’s going to go away if you remove the read access. That said, maybe that’s not such a bad thing. Plenty of people will dislike losing that feature, however.
I’m not sure password managers like Last Pass or 1 Password could actually function without access to the DOM.
So I agree with your sentiment for the most part. Mainly, it’s frustrating to see all of these new image standards come out which somehow compete with each other due to lack of browser support.
That said 44k isn’t peanuts. That’s a huge reduction, especially on lower end connection speeds.
I’m actually game for that idea, it would also make the browser responsible for parsing the many formats of html people use for structuring their input fields.