For me, a.big surprise about Incognito mode after using it was finding, by chance, that opening new Incognito windows did not create separate, new private brows

For me, a.big surprise about Incognito mode after using it was finding, by chance, that opening new Incognito windows did not create separate, new private browsing sessions. I was very surprised to open an Incognito window and visit a site to find it knew who I was and I was logged in there already. My mental model didn't match what I'd assumed Incognito mode to mean. Unfortunately this meant a few years of using Incognito to avoid basic tracking had not actually avoided tracking. After this discovery I switched to Firefox Temporary Containers, which do what I expected and wanted from Incognito mode all along.