Comment 5 for bug 513074

No, firefox-3.0-branding is removed. Here are the steps that I followed. Hope it helps.

$ sudo apt-get dist-upgrade
<<>>
The following NEW packages will be installed:
  firefox-branding
The following packages will be upgraded:
  firefox firefox-gnome-support
2 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
<<>>
Unpacking firefox-branding (from .../firefox-branding_3.6+nobinonly-0ubuntu1~mfs~hardy1_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/firefox-branding_3.6+nobinonly-0ubuntu1~mfs~hardy1_i386.deb (--unpack):
 trying to overwrite `/usr/share/applications/firefox.desktop', which is also in package firefox-3.0
dpkg-deb: subprocess paste killed by signal (Broken pipe)
<<abort>>

firefox-3.0 firefox-3.0-gnome-support -- remain installed, can't be removed by apt

sudo dpkg --force-all -r firefox-3.0 firefox-3.0-gnome-support
<<works>>

sudo apt-get -f install
<<completes installation>>

$ dpkg -l | grep firefox
ii firefox 3.6+nobinonly-0ubuntu1~mfs~hardy1 safe and easy web browser from Mozilla
rc firefox-3.0 3.0.17+nobinonly-0ubuntu0.8.04.1 safe and easy web browser from Mozilla
ii firefox-branding 3.6+nobinonly-0ubuntu1~mfs~hardy1 Package that ships the firefox branding
ii firefox-gnome-support 3.6+nobinonly-0ubuntu1~mfs~hardy1 Support for GNOME in Mozilla Firefox
ii mozilla-firefox-locale-en-gb 2.0.0.7+1-0ubuntu4 Mozilla Firefox English language/region pack

Hope that clarifies.