I mean it is crazy! I can log into a operating system (Windows Server 2016 DS) right in the window of my web browser! Even though my PC does not support virtualization technology (CPU has no support for VT-x or AMD-v), cannot run VM (e.g. VirtualBox), but I can use Chrome web browser to run Windows VM and execute EXE programs right on the cloud!

Why is this possible? Anything to do with web browser front-end rendering technology?

Same as Teamviewer. It is just a form of remote desktop

Baca nie
https://docs.microsoft.com/en-us/azure/bast...astion-overview

Agreed, it is Bastion, as a PaaS. But it is backend. Our frontend (e.g. web browser) must support also, which means it is only possible with HTML5 , without the need of Silverlight or Flash to support <canvas> <audio> <video> vector graphics.

I would like to know further about how HTML5 is making the PaaS possible.

VM on the cloud
there, the VM is executed in cloud, that's pretty much self-explanatory.
The browser only need to capture the mouse pointer position and send it to azure, the it sends back the video, there's no magic there.

Good, I like your explanation.
Thanks!