kmozillahelper doesn't work with firefox 4 beta 7

The Firefox KDE patch hasn't been merged into the Firefox 4 branch yet:
https://code.launchpad.net/~debfx/firefox/firefox-4.0-kde

This bug was fixed in the package firefox - 4.0~b8+nobinonly-0ubuntu1

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firefox (4.0~b8+nobinonly-0ubuntu1) natty; urgency=low

  * New upstream release v4.0b8 (FIREFOX_4_0b8_RELEASE)

  [ Chris Coulson <email address hidden> ]
  * Add a hack to the launcher to handle being launched from an alternative,
    which is a symlink to the launcher script, and breaks the current launch
    mechanism. Also remove a useless stat() from the current script
    - update debian/firefox.sh.in
  * Re-add patch that got dropped to not remove and re-add search plugins
    during upgrade
    - add debian/patches/bz534663_attXXX_normalize_distribution_searchplugins.patch
    - update debian/patches/series
  * Move libmozgnome.so to the main package in common-binary-predeb-arch.
    The previous method of deleting it from -gnome-support and copying it to
    the main package from debian/tmp in each of the binary-predeb targets
    meant that we were shipping an unstripped copy, which caused a lintian
    error. This new method ensures we retain the stripped SO and we still
    only move it after dh_shlibdeps has run
    - update debian/rules
  * Support debug builds. By setting "debug" in DEB_BUILD_OPTIONS, firefox
    will build with --enable-debug and --disable-optimize
    - update debian/rules
    - update debian/mozconfig.in
  * Really build with --disable-gnomevfs this time
    - update debian/mozconfig.in
  * Refresh patches after landing of bmo: 588410 aka Fix make install to
    work with omnijar
    - remove debian/patches/bz588410_fix_make_install_with_omnijar.patch
    - update debian/patches/series
  * Generate the en-US xpi at build time again for importing in to Launchpad
    - update debian/rules
    - update debian/translation-support/install.rdf.in

  [ Jamie Strandboge <email address hidden> ]
  * update debian/usr.bin.firefox.apparmor.10.10:
    - deny write to /var/cache/fontconfig
    - allow read to @{HOME}/.local/share/applications/mimeapps.list
    - allow read to @{PROC}/[0-9]*/mountinfo (LP: #659450)
    - allow read to /tmp/.X[0-9]*-lock
    - deny read to @{HOME}/.local/share/recently-used.xbel
    - deny execute of /usr/bin/gconftool-2
    - allow read to @{HOME}/.thumbnails/*/*.png
    - allow read/write to @{HOME}/.gnome2/firefox*-bin-*
  * update debian/usr.bin.firefox.apparmor.{9.04,10.04}:
    - deny write to /var/cache/fontconfig
    - allow read to @{PROC}/[0-9]*/mountinfo (LP: #659450)
    - allow read to /tmp/.X[0-9]*-lock
    - deny execute of /usr/bin/gconftool-2
    - remove extraneous @{HOME}/.config/ibus/bus/
  * add debian/usr.bin.firefox.apparmor.11.04:
    - based on 10.10
    - remove redundant abstractions included by the gnome abstraction
      (LP: #692406)
  * debian/rules: updated for usr.bin.firefox.apparmor.11.04

  [ Micah Gersten <email address hidden> ]
  * Change xubuntu applications defaults list in natty apparmor profile; Path
    changed in xubuntu-default-settings (11.04.0)
    - update usr.bin.firefox.apparmor.11.04
  * fix LP: #694391 - Kubuntu Firefox Installer Fails; Add Replaces on
    kubuntu-firefox-installer again in firefox-branding
    - update debian/control

  [ Felix Geyer...