Yes, incognito windows and tabs share cookies. The cookies are deleted once you close the incognito window of course and are not shared between the incognito wi

Yes, incognito windows and tabs share cookies. The cookies are deleted once you close the incognito window of course and are not shared between the incognito window and the regular browser window. But as long as one incognito window is open your cookies are still there. Edit: You can easily test this by logging into GMail in Incognito mode and then going to youtube/google maps etc. and notice that you're still logged in. Even if you open a new incognito window.