Comment by destroy-2A

Yes this exists, symantec web isolation basically a proxy that injects a little js on the client, instead of proxying http traffic it opens a vnc viewer in your browser, the proxy renders the site you requested in a per session container inside the proxy cluster and your browser displays the output and sends your interaction with the site to the container. some mostly asian financial regulators mandate this happens for all endpoint devices, mobile, thin client, desktop whatever if a human is on the end it must be "web isolated".