I cannot delete Cookies and Site Data. When I delete entries from the list
Preferences/Privacy&Security/All Cookies and Site data by either pressing
Delete all or cherry-pick-delete them, when I close the list and reopen it, ALL ENTRIES ARE BACK!
This is a huge, immense security concern, since that means that my local storage is still filled with identifiers that I never authorized and that are used to track me against my will.
Running Opera 49.0.2725.39.