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> Multithreading is a disaster, it's just not a workable model for browser-scale applications.

All browsers, Chrome as much as any other, are heavily multithreaded, so this is clearly untrue.

Ok, you got me. What I said was nonsense, taken literally, I was being lazy; you're right, Chrome's heavily multithreaded too. But, there is process-level separation both between tabs/browser contexts with information of differing security sensitivity, and between nasty stuff like parsing and rendering versus basic UI etc. All the good defense-in-depth sandboxing that others have alluded to, that is the stuff of many papers.

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