URL bar domain based sandboxing mode

[mch]

Let's say I surf to website foobar.com. The site sets third party cookies for multiple other domains.

The idea is, those cookies (and other data) would stored in the browser but they would be available only when URL bar is something like foobar.com (e.g. www.foobar.com). If I browsed to foobaz.org (in the URL bar) it could set the exactly same cookies for those other domains but the cookies set while in foobaz.com and foobar.com would be kept separated from each other in the browser.

So, each domain in URL bar would be its own sandbox, or cookie space. Maybe it could be configurable to which domains this applies for, and maybe there could be option to include all except some by default.

It would be different from indognito mode because the cookies and data could be preserved. Sites would be fooled to believe the user doesn't have tracking protection. True, it wouldn't be full tracking protection - they would know when the same user visits their site - but it would reduce the probability letting another website to reveal it as well.

Of course cookies aren't the sole identification method and this wouldn't protect against those but it would add a notch more privacy.

[Jon]

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