For the time being, I've worked around this bug by creating my own wrapper around mozilla-runtime.
I dpkg-diverted mozilla-runtime out of the way: sudo dpkg-divert --local --add --rename /usr/lib/xulrunner-1.9.3a4pre/mozilla-runtime I then created in a text editor (nano) and marked executable (chmod +x ) a new mozilla-runtime with the following contents: #!/bin/sh export LD_LIBRARY_PATH=/usr/lib/xulrunner-1.9.3a4pre/:$LD_LIBRARY_PATH exec /usr/lib/xulrunner-1.9.3a4pre/mozilla-runtime.distrib $@ It seems mozilla-runtime is being called with neither PATH nor LD_LIBRARY_PATH containing the xulrunner directory. Note that since I have overridden mozilla-runtime, apport now gives me "This report does not apply to a packaged program": https://bugs.launchpad.net/apport/+bug/83105 Once we get an official fix, you can undo my changes by deleting the custom "mozilla-runtime" wrapper, and then un-diverting the original: sudo dpkg-divert --local --remove --rename /usr/lib/xulrunner-1.9.3a4pre/mozilla-runtime ** Attachment added: "mozilla-runtime wrapper" http://launchpadlibrarian.net/44376713/mozilla-runtime -- Flash, Java, etc. does not work with out of process plugins and causes Firefox to become unresponsive https://bugs.launchpad.net/bugs/513887 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs