Submit notepad-plus-plus.org for HSTS preloading
HSTS is a way to force users to connect to a website using HTTPS after they have visited the website at least once. HSTS preloading preloads the browser with the website’s request for HTTPS only, eliminating the need for the user to visit the website first (on a potentially insecure HTTP connection).
Please submit notepad-plus-plus.org for HSTS preloading here:
This link will also guide you through the changes that need to be made before notepad-plus-plus.org can be submitted for HSTS preloading.