If your branded domain supports SSL (https protocol) then you may want to share your custom short URLs (branded links) using Https:// and not just with Http://. This will improve the compatibility and trust for your links.
Rebrandly allows you to decide how the short links you create should be copied to your clipboard by default: with Http or Https.
If you wish to edit this for any reason, it is a specific domain setting and can be accessed from the in your account. Toggle the option on/off as you wish and every time you share a branded link with that domain from the Rebrandly Dashboard or from the Browser extension it will contain http/https by default based on your setting.