... I think if you do what I suggested then not only will Pale Moon start with the home-page you have entered but new windows will also render that home-page as well and if your concern is that you typically want to return to the same tabs then do the following explained below to get what you want.I'm still getting exactly the same behavior: opening a new window shows a blank, white page (what I don't want).
If you want to keep all of your tabs so the next time PM starts you will not lose the tabs you had before why not try this pref: browser.showQuitWarning set to "true" so that you would get this prompt when exiting Pale Moon: that provides you the option to "Save and Quit" thus saving all the tabs upon exit.
This way if I'm not mistaken you will get the home page for new windows which is what you're having problems getting and you also have the option to retain your tabs as you left them for the last browser session if that's what you want to do.