Firefox now includes safeguards to prevent sites from abusing the history API by generating excessive history entries, which can make navigating with the back and forward buttons difficult by cluttering the history. This intervention ensures that such entries, unless interacted with by the user, are skipped when using the back and forward buttons.
Nice
It says you’re bound by “opening and using” the product, rather than “opening or using”. Have someone else open it for you. Then neither of you have done both.