[oceanswave]

generally Chrome and IE/Edge spawn separate processes per tab for isolation, but will sometimes group them based on some conditions. On the flipside I'd hate to have some 3rd party program bring down my browser.

So I get what you're saying, but the worst case is that your browser will do the same thing for each tab.

Software like Excel which will spawn a different instance of Excel for each workbook, even though it could theoretically be a single process... so it's not like native apps are a panacea in your argument.