Want to know the password you have entered for your gmail (usually prefilled by autocomplete tools?)

Steps:
1. Go to https://mail.google.com
2. Enter the below statement in the address bar
javascript:alert(document.getElementById("Passwd").value)
3. Press enter
You will get a popup with the password
Note:
When you copy -paste the above statement, browsers strip the javascript: from it, make sure that is included

Find the screenshot for reference