To give a link: - I am quite prepared, and happy, to be shot down, but what I as told to do was right-click the address bar at the top of the screen (to the right of the arrws) and then click "copy" from the drop-down menu; choose where you want to put it on your message, right-click, and then choose "paste" from the drop-down menu.
I must admit that this doesn't alway work for me - but some of the time it does!