Comment 2 for bug 87364

This should have been fixed in

apport (0.56) feisty; urgency=low

  * apport/ui.py, open_url(): When being invoked as root, call gnome-open or
    firefox as root through sudo instead of dropping our uid/gid and calling
    it normally. The latter does not work for Firefox for some mysterious
    reason. Thanks to Mika Fischer for this trick. (LP: #81207)

What is the output of

  dpkg -l apport-gtk

for you? If your version is older than 0.59, please upgrade your Feisty system.