I am curious why Safari in particular is getting a lot of the hate here when firefox supports even less of the features which leads me to believe that the reason many of these features have not been accepted is because they have not been accepted by the larger ecosystem and is just google pushing their own things as standard (Feels like IE days in many ways).

That being said, I am not sure why I would actually want most of these features in the browser? Many of these things feel like they further complicate what a browser is supposed to be doing and opens up security concerns at the same time.

I think the idea of using a web app for many tasks instead of apps is fine, but I don't think the idea that a web app can do everything is the way to go.

Edit: To be clear about the Firefox comment, notice that many of the features that are not supported non chromium browsers don't support on any platform. So the question on whether these are considered web standards is outside of whether iOS allows other engines.

Edit again: Apparently the third column is based on your current browser instead of always comparing chrome, mobile safari, and firefox like I assumed. I am currently on Firefox on Windows, and there are more red X's under Firefox for me. Seems like a weird choice to not always compare all major browsers.