text: The term "ice weasel" appeared earlier in a line which cartoonist Matt Groening fictionally attributed to Friedrich Nietzsche: "Love is a snowmobile racing across the tundra and then suddenly it flips over, pinning you underneath. At night, the ice weasels come."
  Debian was originally given permission to use the trademarks, and adopted the Firefox name. However, because the artwork in Firefox had a proprietary copyright license at the time, which was not compatible with the Debian Free Software Guidelines, the substituted logo had to remain. In 2006, Mozilla withdrew their permission for Debian to use the Firefox name due to significant changes to the browser that Mozilla deemed outside the boundaries of its policy, changes which Debian felt were important enough to keep, and Debian revived the Iceweasel name in its place.
  Subsequently, on 23 September 2007, one of the developers of the GNU IceWeasel package announced that the name would be changed to GNU IceCat from IceWeasel in the next release, so as to avoid confusion with Debian's separately maintained, unrelated rebranding of Firefox. The name change took place as planned and IceCat is the current name.
  IceCat was ported to the Firefox 3 codebase during Google Summer of Code of 2008.
  Distribution
  GNU IceCat is freely downloadable as source code from the GNU project.