Much appreciated though I'd already removed Firefox view before I made any posts here. I meant that I'd like an option to remove the "List all tabs" button, because as I said, I think it is a waste of space if I don't have enough tabs in a window tha...
For everyone like me who wants to reverse the change of private windows opening as a separate window on the windows taskbar: in about:config set browser.privateWindowSeparation.enabled false and if you dislike it saying private browsing in the corner...
Could you then please reply to the people who have asked for the option to at least stop private browsing from showing as a different window/icon in the windows taskbar?