But you can firewall (in 10 different ways) notepad.exe. You control what notepad has access to. You can access anything notepad.exe can bypassing notepad.exe.

But you can firewall (in 10 different ways) notepad.exe. You control what notepad has access to. You can access anything notepad.exe can bypassing notepad.exe. You cannot effectively firewall your browser, because you don't control the backend. You cannot bypass the backend of a piece of cloud software. This is a generic problem with cloud software. Any cloud software has access to your data AND YOU DO NOT. To a certain extent it even has access to your data in other apps (e.g. getting your mail address). It's a way to (currently usually partially) transfer ownership of everything you make with software, and your own data from the user to the creator of the software. This obviously an extremely negative development in the long run, but people seem quite keen on just accepting it ...