Interesting but I am not a fan of how they don’t mention disabling features like WebAssembly in the short description.
they did mention it in the long description. It's off for now but they are planning on turning it on. I'd guess it's safer than JIT because the translation to assembly is simple, or can be simple. It's not trying to do the complicated process of analyzing a dynamically typed language and applying different ways of optimizing.
> Disables the JIT and enables new security mitigations to provide a more secure browsing experience - Windows