I am going to take a chance and go contrary your signature line: "She who answers a matter before ..."
All you have to do is open two windows, the first one is the composing box here at BN and then open another window with that text of that article or whatever and HIGHLIGHT THE URL, right-click Copy. Minimize that window.
Go back to the first window - having the cursor BLINKING - at the spot where you want to insert: Right-click Paste. That URL appears. Voila.