I think they're referring to the browser hiding parts of the URL, the way Chrome does. Unthinkingly following Chrome, Firefox started doing this too. To my kno

I think they're referring to the browser hiding parts of the URL, the way Chrome does. Unthinkingly following Chrome, Firefox started doing this too. To my knowledge, Firefox still defaults to doing this, but I could be mistaken. https://support.mozilla.org/en-US/questions/879926 https://support.mozilla.org/en-US/questions/879926