@ Egimatist: I reread the FAQs on the Pale Moon web site and found the following info:
How do I update Pale Moon?
Pale Moon has a built-in update checker. If you let Pale Moon automatically check for updates (which occurs every other day by default), you will be notified and given the option to download and install the later version from within the browser. You can also manually check and start the update from Pale Moon's Help -> About dialog box.
I did look but found no automatic update control tab or anything like that. I apparently mis-remembered about the settings. So it should offer you a chance to auto update. If so, just decline. I hope that helps a bit more.