Which step is not working? What article are you referring to?

Are you trying to create a shortcut to Firefox or to a particular web page?

Not sure what method you are following or what you are actually trying to do.

If you wish to create a shortcut to a site and have Firefox open:
Drag the tab to the desktop, but do that by dragging the icon on the end of the location bar, not the tab itself. Dragging the tab is used to repossition the tab on the tab bar or to move it to a new Firefox window.

• Deskcut: https://addons.mozilla.org/firefox/addon/deskcut/