Your internet browser saves login data for websites on request. Although this is considered unsafe because a PC virus can read this data, it is still done by many. When logging in again to a website, the browser automatically sets the username and password in the corresponding fields. However, the password is hidden by asterisks. If you want to know which word is hidden behind the asterisks, it is usually quite cumbersome to do so via the browser settings.
From now on, you can always click on the ISeePass bookmarklet when a password is hidden behind asterisks in the browser.
(translated from German)