Analysis of information sources in references of the Wikipedia article "Debian–Mozilla trademark dispute" in English language version.
The Gnuzilla, Connochaetos, and Parabola web browsers however, were and still are, re-configured significantly more than the Debian IceWeasel was, in order to meet the GNU guidelines. That is the primary reason why Gnuzilla, Parabola, and Connochaetos still refer to their web browsers as something other than: "Firefox".
Iceweasel differs technically from Firefox, mainly in that it removes support for DRM and other features that the FSDG considers to be non-free or anti-features, such as DRM and recommendations of non-free add-ons.