Chrome:

  1. In the address bar, type “chrome://net-internals/#hsts”.
  2. Type the domain name in the text field below “Delete domain”.
  3. Click the “Delete” button.
  4. Type the domain name in the text field below “Query domain”.
  5. Click the “Query” button.
  6. Your response should be “Not found”.

 

Safari:

  1. Close Safari.
  2. Delete the ~/Library/Cookies/HSTS.plist file.
  3. Reopen Safari.