When I clear website data in Safari (Preferences –> Privacy –> Manage Website Data… –> Remove All), nasdaq.com and yahoo.com remain in the list. Is this a known issue, and how can I fix it?
Safari Privacy – Why Nasdaq.com and Yahoo.com Aren’t Removed When Clearing Website Data
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Best Answer
Those are likely "perma cookies" which are cookies that use javascript and other methods to make the cookies persistent even when you have explicitly removed all cookies. Which is annoying as hell and a known issue.
I found an Apple discussions post that purports to show you how to delete these.
Which boils down to