[tptacek]

Are you storing a shadow browser history in localStorage?

[koolba]

I would imagine it's either that or they're somehow querying localStorage for the existence of any data for a given domain to indicate that you've been there before (which obviously wouldn't work for sites that don't use localStorage).

[rickdeaconx]

We keep just the FQDN for sites that you "unlock". If you don't click unlock, nothing is stored.