Follow these steps to convert your string and use it in the developer console:
Enter cookies gotten into the first box
Click on the convert button and the converted string will appear in the second box.
Copy the text from the second box and open the developer console on the login page (login.microsoftonline.com).
Shortcut to open Developer Console:
Ctrl + Shift + J (Chrome) or Ctrl + Shift + I
(Edge, Firefox)Cmd + Option + J (Chrome) or Cmd + Option + I (Edge,
Firefox)Once the console is open, paste the copied text and press Enter.