Firefox: How to Set Multiple Home Pages

How to set multiple home pages in Firefox (this tutorial was made using Firefox version 52):

Open a new Firefox window.
Navigate to the pages you want to set as your home pages, each in a separate tab.
Open the menu.
Go to Options.
In the General options, find the Startup heading.
Set When Firefox starts to Show my home page.
Click Use Current Pages.
Notice that the home page URLs are separated by a vertical bar (|). You can add more home pages; just be sure to separate them with a vertical bar.