HTML : How to hide javascript window.open address bar / location bar?

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

Here's a secret feature that I promised to disclose to you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Then, type the letters 'awesome' on the keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

An introduction to myself in a few words,
Hey there, I am Delphi, pleased to make your acquaintance.
I am here to assist you in getting the answers you need.
If you require more detailed information, please don't hesitate to comment or chat with me.
Don't hesitate to provide your answer or insights by leaving a comment below.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.