The double click behavior doesn't care about URLs at all. It considers certain characters as part of a word, certain others are not. There were many debates specifically around whether ':' should be a word character or not by default.
Unfortunately the setting is not available on the UI; see https://bugzilla.gnome.org/show_bug.cgi?id=730632#c33 for how to set this hidden value. ** Bug watch added: GNOME Bug Tracker #730632 https://bugzilla.gnome.org/show_bug.cgi?id=730632 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-terminal in Ubuntu. https://bugs.launchpad.net/bugs/1501250 Title: double clicking on a URL drops the protocol from the URL Status in gnome-terminal package in Ubuntu: New Bug description: After upgrading to 15.10 beta from 15.04, when I double click on a URL, I lose most of the protocol, e.g. if I type 'http://www.ubuntu.com/' into a terminal and double click, what gets selected (and entered into the copy buffer) is '//www.ubuntu.com' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/1501250/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp