Firefox starts with a chrome://*.xul URL, which is a reference to a Add-On extension in Mozilla-derivative browsers. Firefox as of version 43 blocks automated installation of unsigned extensions. IBM’s commonlaunchpad xpi extension (found in the extensions directory of the new Profile being used by launchpad.sh) is unsigned.
To workaround this downgrade Firefox with a version prior to 43: https://ftp.mozilla.org/pub/firefox/releases/42.0/
Unpack and copy to /usr/local/firefox/firefox, create link: ln -s /usr/local/firefox/firefox /usr/bin/firefox