Launchpad does not work with Firefox 17.0.3 on Linux
As Privileged APIs are removed in Firefox 17.0.3, some modification to launchpad preferences is required before you can start the launchpad with Firefox 17.0.3.
Resolving the problem
To start the launchpad with Firefox 17.0.3;
1. Open the <launchpad_root_dir>/launchpad/preferences.sh file, and edit it to add the following line to the file (this line can be added anywhere in this file):
echo 'user_pref("security.enablePrivilege.enable_for_tests", true);' >>$userprefpath/user.js
2. Restart the launchpad.