Windows starts to have something but it is only available in last versions of Windows 10, probably not enabled by default, and the model might not be exactly wh

Windows starts to have something but it is only available in last versions of Windows 10, probably not enabled by default, and the model might not be exactly what is needed anyway. I don't even remember what it is supposed to protect against precisely -- and MS does not do a lot of communication about it. They maybe don't officially consider it a security boundary (same as UAC). Mozilla seems to be concerned about attackers having admin privileges (but that are still shy of just plainly hacking the Firefox binary or something crazy like that): quite hard to defend against that... and if you can, that means the user actually has lost some control over its own computer, which is a situation which has its own issues.