[anarazel]

I think there's several levels. As a first step, I'd appreciate reducing the risk of javascript extracting contents from outside the browser. A second step could be to use more granular core scheduling within firefox, to prevent sharing cores that shouldn't be shared. A process/thread hierarchy can create multiple core scheduling groups.

[rockdoe]

>As a first step, I'd appreciate reducing the risk of javascript extracting contents from outside the browser.

But that means essentially reserving a core for the browser only. I don't think that would be shippable by default.