For Chrome/Chromium, I currently have "Incognito This Tab". (I used an extension called "Incognito This" first but one of its updates asked me the approve an a

For Chrome/Chromium, I currently have "Incognito This Tab". (I used an extension called "Incognito This" first but one of its updates asked me the approve an array of extra unnecessary permissions which I obviously declined, then proceeded to uninstall the extension. The one I use now isn't quite as convenient but does the job.)