How to open the Developer Tools in your Browser
Firefox
https://developer.mozilla.org/en-US/docs/Tools
Internet Explorer
https://www.isunshare.com/windows-10/3-ways-to-open-developer-tools-in-ie-on-windows-10.html
Edge
https://docs.microsoft.com/en-us/microsoft-edge/devtools-guide-chromium
Safari
https://coolestguidesontheplanet.com/safari-web-developer-tools-show-dock-browser-window/