You can check the home page setting.

• Options/Preferences -> General -> Startup: Home page
• https://support.mozilla.org/kb/How+to+set+the+home+page

Firefox supports multiple home pages separated by '|' (pipe) symbols.

Thank you, but the page cited doesn't seem to explain why FF opens multiple iterations of the BG home pages and how to stop it from doing so. I am attaching images to show what I mean.

As you can see in the first attached image, I have the three home pages (The Register, City of Lowell, and MUTCO), plus this response open in tabs. I then clicked the home icon twice while the The Register tab was open in front. This created two duplicates of the City of Lowell and MUTCO tabs, as you can see in the second picture.

It's that proliferation of duplicate tabs that I'd like to stop, if at all possible.

Thanks, again, but...

If you click the home button then all pages that are set as multiple home pages will be opened once again even if you have already opened them before in tabs. You need to close open tabs or open a new window to start with a fresh tab list before clicking home. note that you can hold Shift and left-click Home to ope the home pages in a new window.

So you're saying that it's not possible to just refresh/home the frontmost tab without duplicating all other homepage tabs. hmmp... Seems to kind of kill the usefulness of the Home button as a one-click solution if you have to go around cleaning up after it every time. Well, I guess I can just have one home window and just keep the other ones open as "non-homepage" background tabs on the one window. Not as convenient as knowing that they'll always come up in a new window if I accidentally remove them from the one, but more convenient than remembering to close a dozen rogue tabs every couple of hours.

Thanks for the info.

You can place bookmarks in a bookmarks folder on the Bookmarks Toolbar and open all these bookmarks at once by middle-clicking this bookmarks folder.

If the original pages are still open then you can all reload tabs or only the current tab via the right-click context menu of the tab on the Tab bar.

So I've reset things to only have one tab open on a new page and put the other two into a folder in the bookmarks bar. It's a workaround, but it DOES work. I just can't figure the logic for the designed action. I mean, if clicking home just reset the active tab to home and left the others alone, that would make the most logical sense to me. If it reset all of the multiple tabs to their homepages from wherever I had navigated to on them, THAT would make SOME sense. I just can't see any logical reason why FF would be designed to go to the home position of the active tab but open a duplicate copy of a home tab that's in the background.

Whatever. The one home tab and the folder will work well enough for what I need.

Thanks again; I appreciate the responses.