I fixed the CopyAndGo add-on Puntuado con 5 de 5 estrellas
For those who are interested, Version 1.5 is available for installation on a site of my homepage. http://netticat.ath.cx/MyAddons/MyAddons.htm#3rdpartyaddons
Scroll to the bottom and you should see Copy and Go 1.5 along with some other 3rd party add-ons.
Copy and Go 1.5 is an improved version. In most cases you don't even need to mark the plain text URL, just right-click it and click CopyAndGo! This version also supports copied URL's from other applications, that means it can work like PasteAndGo.
I am add-on developer here - maintaining my own own extensions on AMO