Develop an API in Windows. Contribute to the Chromium codebase to use this API.

We already have "Launch as Administrator"

add "Launch in private mode"

So now the user has to remember to not only open a private window or tab in their browser, but also open the whole browser in private mode?

If you want to be really consumer focused, the OS could keep the browser (and other apps) honest about some of it's privacy guarantees by not affording it any persistent storage between sessions.

For one, OCR’ing the word Incognito from the screen?

So I just add a new custom toolbar to the bottom of the screen titled "Incognito" so that the text is always there, and suddenly nothing's being recorded anymore? :P

On one level that's convenient, but on the other hand I'm not sure it's a very robust design.

That only works if you have the "New Incognito Tab" page active. Not when you're actually browsing something.

There's also the profile button at the top right, just to the left of the hamburger menu, that says "Incognito" on it.

Yeah I forgot about that.

What if it’s fullscreen? What if the title bar of the window is off the screen?

A better solution would be to just pause the screen capture whenever incognito is open anywhere

While they seem to be adding an API for it, if you wanted you could just add a "block screenshots" API.

This is already basically in place with DRM since the windows screenshot utility won't screencap most DRMed content on win apps like netflix or even on firefox nowadays.

What MS is adding on top of this is an API to check which tabs/web pages are visible and selectively black out web pages that are added to a given user level blacklist.