HSTS "super cookies".extremely persistent.especially in Safari

“Private” or “incognito” browsing modes do not help.

[Leosghost]

A UK consultant has demonstrated how a feature of the secure Web protocol HTTPS can be turned into a tracking feature that is, in the case of some browsers, ineradicable.

[theregister.co.uk...]

[lammert]

And one of the three authors of the RFC describing this protocol is a Google employee.
Also interesting is that these super cookies are readable by any website you visit, not just the website which placed it.

[engine]

This supercookie is just the sort of thing that gets the privacy advocates worked up. Rightly so, imho.

[toidi]

This helps explain why google wants all sites to go https!