Установлен ли в вашей системе xulrunner?

% dpkg-query --list 'xulrunner*'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
un  xulrunner-1.9  <none>                    (no description available)
un  xulrunner-1.9. <none>                    (no description available)
un  xulrunner-1.9. <none>                    (no description available)
ii  xulrunner-10.0 10.0.12esr-1 amd64        XUL + XPCOM application runner