How to hide the menubar/toolbar/locationbar/statusbar of current window ?

hello guy,
good day.
Can u pls help to solve this issue.
I wants to hide menubar, toolbar, locationbar and statusbar of current window.
I wants this functionality works in all major browsers.
Thanks in advance.
Bye.

I’m not aware that you can do this for the current window, only for windows opend by window.open().

PS. I would immediately leave, if a website changes my browser window the way I don’t like.