There are currently 3 billion Internet users in the world and that is almost 40% of the world population. Now, of these 3 billion inhabitants in the world, about 15% use the Firefox browser according to wikimedia statistics.
This means that out of 7 billion people on earth, about 0,5 billion people use Mozilla.
In addition, 7 out of 100 people in the world use Firefox.
This is a large sampling space for data retrieval. I mean it is much larger than the sample space of exit polls used by media companies.
Mozilla used this data and put it in a map file. A map that displays the user retrieving data from mozilla.
And this looks really cool. This also tells you the story of internet penetration around the world. Africa is in the dark to see the United States illuminated by the full moon in this map. This also speaks of the unequal distribution of the Internet in the world.