If you would like Hookmark to open automatically at login, please use System Preferences; search for Login Items; and add Hookmark to the list.

Ventura

If you are using macOS Ventura macOS 13 (Ventura): Login Items:

1. On your Mac, choose Apple menu > System Settings,
2. click General in the sidebar,
3. then click Login Items (you may need to scroll down);
4. click the Add button below the list of items;
5. select Hookmark;
6. then click Add.

See Open items automatically when you log in on Mac – Apple Support.

Pre Ventura

If you are using macOS versions prior to Ventura,

1. choose Apple menu > System Preferences
2. choose Users & Groups
3. click on Login Items
4. drag and drop the Hookmark icon from Applications folder