This page has called
Since no data has been stored, no database file should have been created.
If you click here, data will be stored, and a database file should be created.
If you click here, the local storage will be cleared, and the database file should be gone when the browser is closed.
(This is for https://bugs.webkit.org/show_bug.cgi?id=40301 and https://bugs.webkit.org/show_bug.cgi?id=40767.)