It's not terribly useful for people who open stuff from within the browser, but for the past couple of years I've actually had my default browser in Windows set

It's not terribly useful for people who open stuff from within the browser, but for the past couple of years I've actually had my default browser in Windows set to incognito/private mode of whatever browser I'm using. This way I don't have to think about it, and I also don't have to deal with things like Gmail deciding that I've already seen some emails because my inbox loaded in a background tab.