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
There’s an add on that lets you create custom containers, a container acts as it’s own session in a way, content, cache, cookies etc are all localised to one container
For example, you open youtube in one then open gmail in another container, neither one will know you’re logged into the other
Yup, I use the multi-account containers addon and have one for work, one for personal, one for banking stuff, one for shopping, etc. You can have websites locked to a given container, or you can choose each time you open a link.
However, that’s a completely separate concept from private tabs. With private tabs, once you close the last private tab, your entire session is cleared.