Cache time comes from the origin/site HSTS header. Part of it may look like so: strict-transport-security:max-age=15552000… basically you need it to say strict-transport-security:max-age=0 in order to disable HSTS for clients and wipe out their redirects.

response.headers["Strict-Transport-Security"] = 'max-age=0'

Error code: ssl_error_bad_cert_domain.

If you see “I understand the risks”, follow these instructions. Otherwise:

• Close all tabs open with the site.

• Clear your history.

• In the address bar, type about:permissions.

• Search for and click on the site.

• Click “Forget About This Site”.

Error message “Cannot connect to the real <domain name>.”

• In the address bar, type

  chrome://net-internals/#hsts

• Type the domain name in the text field below “Delete domain”.

• Click the “Delete” button.

• Type the domain name in the text field below “Query domain”.

• Click the “Query” button.

• Your response should be “Not found”.

Error message “Cannot connect to the real <domain name>.”

• In the address bar, type

  chrome://net-internals/#hsts

• Type the domain name in the text field below “Delete domain”.

• Click the “Delete” button.

• Type the domain name in the text field below “Query domain”.

• Click the “Query” button.

• Your response should be “Not found”.

• Close Safari.

• Delete the ~/Library/Cookies/HSTS.plist file.

• Reopen Safari