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
How is it better than, say, LibreWolf or Waterfox?
It’s the Tor browser without Tor, there’s a wipe button just for this issue.
I’m asking for like specific features
It’s not a replacement for Firefox or it’s forks, it’s a complement to your main browser. It’s like private browsing but always private and always separate from your other browsers and won’t save any data locally except maybe bookmarks.
The link I originally posted should explain this but here is a page that explains it in greater detail: https://mullvad.net/en/browser/hard-facts. Some more links:
It is a fork of Firefox and what I’m asking is what advantages it gives over librewolf, which also tries to do the same stuff
Your last link is a 404
Mullvad is a fork of Tor Browser so it gets some features from that like:
Discussion about this https://github.com/mullvad/mullvad-browser/issues/1