Private Chromium-based browser windows share state between tabs, at least on Windows*. You need to close out all private instances of that "install" of the brow

Private Chromium-based browser windows share state between tabs, at least on Windows*. You need to close out all private instances of that "install" of the browser to drop the contents: They are just not saved into a history, beyond that tab's history. Cookies, however, are stored (in memory, I am guessing) until the session closes. ------ * - others might too, but I only have access to Chromium/Win right now.