Kernel sandboxing.

That's a class of different mechanisms. I updated my comment above. I'll repeat the text there:

In another comment, you say that you want to trust the “kernel” instead of the browser. Okay, fine. There are a whole class of isolation mechanisms there. What mechanism are you proposing using? Remember that you are needing to give access to your 3d hardware to whatever software package is involved here, and the Linux kernel, at least, doesn’t have a mechanism for creating virtual, restricted “child” graphics devices. The closest I can think of on Linux you can get at a kernel level there would be pass-through from a VM to a dedicated graphics adapter, which probably isn’t going to be an option for most people and I have doubts about being a carefully-hardened pathway compared to browser APIs.

Which is why using the web without JavaScript is a security measurement which I strongly recommend to enable.

Virtually every website out there today uses Javascript. Lemmy uses Javascript. What makes this particular website a risk?

do you, really?

Yeah, I do. Fifteen years ago, I used NoScript, and some things broke, but it was usable; there were enough people running non-JS-capable browsers that websites had a reasonable chance of functioning. The Web generally does not function without Javascript today.