Using the URL Validation Option
Ensure data integrity by validating URLs throughout the Admin, or turn validation off to allow greater flexibility.
Bullseye has the option to enforce validation on URL fields throughout the Admin. When enabled, URL fields will only accept values that that start with http:// or https://. Some fields, like the Contact URL and Link attributes also accept values that start with tel:, mailto:, or sms:. When disabled, URL fields will accept any value (including URLs beginning with www, without http:// or https://).
This option is enabled by default on accounts created after December 18, 2018. It can be turned on or off via Settings > Setup > Options > Location Options.