Be careful, your understanding of incognito mode in Firefox may be wrong and that could be costing you
All the incognito browser windows share the same "session" in Firefox. So say you open an Incognito window to browse Facebook or something, then you open another Incognito window, this new incognito window is linked to the previous incognito window, meaning you are logged into Facebook at that new Incognito window as well. This is because, as I explained before, all the incognito windows share the same "session"
The only way to clear incognito window is to close ALL of them and then create a new incognito window. You dont have to close the main non incognito Firefox window though, just close all the incognito windows. Then open a new one, now your previous session is destroyed and you are new again.
You may know it but its not that common knowledge as it should have been
Maybe it's because I have a programmer mentality but this is exactly the behavior I would expect, otherwise the "open link in new window"won't work reliably, all popups would fail and you couldn't "tear" off a tab in a new window
Though I must say as a dev, being able to use 3 different safari windows for 3 different accounts to test is wonderful, instead of needing multiple browsers.
I am from the year 2443, just some casual time travelling. (and direct writes to PostgreSQL)
Fun fact: my display name is also illegal, you can't set it in the UI.