Rated 5 out of 5 stars

Από τον/την ander στις Απρίλ. 29, 2015 · μόνιμος σύνδεσμος

Works great! Just one minor quirk: I've found that when I inadvertently use it to copy some text that's already plain (e.g. Google Maps URLs), it fails to copy at all. Don't know why—but I'll just try to remember to use regular Copy in those cases.

FLOOD212: Try Keyconfig, here on the FF Add-ons site. It lets you easily redefine any of FF's shortcuts.