This makes little sense, it doesn't protect you from exploits, they just run on the cloud instead.
If an attacker has a browser exploit, they can still..
- read all your email
- log all your passwords
- wait for you to login to online banking and transfer all the money.
You also have to worry about the host being compromised, or the operator logging your activity, etc.
If this is something you really want for some reason, why not just RDP/VNC/Chrome Remote Desktop back to your office/home network.