I tried gnome-open http://banshee-project.org/ from the command line and it works fine, actually.
The corresponding BGO is #380775. -- Banshee Web resource help links fail to load if browser not open https://launchpad.net/bugs/73995 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs