The UK government stated:

If Mozilla permit the sale of copied versions of its software, it makes it virtually impossible for us, from a practical point of view, to enforce UK anti-piracy legislation

It seems they really don’t understand the whole open source thing do they? You can’t pirate open source software, you can however sell it however you like. Most companies just charge a nominal fee to cover the cost of the CD and the postage.

I can’t believe that your company would allow people to make money from something that you allow people to have free access to. Is this really the case?

The contact from Mozilla licensing actually responded back attempting to explain the situation.

I wrote back, politely explaining the principles of copyleft & that the software was free, both as in speech and as in price, and that people copying and redistributing it was a feature, not a bug. I said that selling verbatim copies of Firefox on physical media was absolutely fine with us, and we would like her to return any confiscated CDs and allow us to continue with our plan for world domination (or words to that effect).

Source: Slashdot – Times Online