original apple start page

Details on related Safari settings:

Customize the start page in Safari on Mac - Apple Support

Change your homepage in Safari on Mac - Apple Support

At one point, Apple was using the following as the default home page:

http://livepage.apple.com/

That still works. In Safari > Preferences > General, You can set to that, set to blank for none, or can set to the current webpage.

Safari Preferences > General. then change BOTH "New windows open with:" and "New tabs open with:" to "Start Page"

Enable Guest account and check what the defaults are. Then disable Guest account, if needed.

I prefer empty startup pages:

I assume you are using a Mac? Just create a new user account on your Mac and the new account will have default settings.