Introduction
Many modern Internet browsers support the capabilty to load webpages in a private mode, that prevents local cache, cookies, logins, and more from affecting how the website loads. This is called Private Browsing, Incognito Mode, InPrivate Windows, and other names.
Procedure
Chrome
In Chrome, click the Menu Icon > 'New Incognito Window'. The File menu has this option as well.
Firefox
In Firefox, click File > 'New Private Window'
Edge
In Edge, click the Menu Icon > 'New InPrivate Window'
Safari
In Safari, click File Menu > 'New Private Window'