How do I remove and further setup default URLs?

Hello, To add "default URLs" click the menu (3 horizontal lines) and click settings >home >Homepage and new windows> and click the dropdown and choose "Custom URLs" To remove them, go to the same "homepage and windows" section, and click inside the custom URLs text box, and delete the URL that you would like to remove, along with the vertical bar ( this thing -> | ) associated with it. If you are trying to remove the ''shortcuts'', (PC) hover your mouse over the shortcut and click the 3 dots in the top right corner of the tile, and select dismiss or delete from history. (mobile) hold a tap on the shortcut, then select delete from history or remove.