

Not afaik. You either allow it or not. Doing so selectively would require a lot more knowledge than I have.
As a workaround however, running a VM and using your browser from within that would seem like a decent-ish way to obtain similar results with minimal effort. You can use the hypervisor to set whatever limits you require.
Not gamedev but other software, going through the exact same thing (new, external CEO). Guess the axeman cometh for us all eventually.