As many people know, every version of Firefox receives a code name after a national park, somewhere in the world. In the past, there have been Firefox code names for parks in the Canada, Italy, Japan, Madagascar, and Indonesia, among others.
Firefox 4 has been given the code name of Tumucumaque, after the Brazilian, Amazonian park. While not entirely finalized, the name will likely be announced at the Mozilla Summit 2010 early next month.
The tradition of using park names officially started with Firefox 2, though Firefox 1.5 had the code name of “Deer Park”, which wasn’t actually a park.
In recent months, the Mozilla Foundation (MoFo) has been capitalizing on the park names and using them for fundraising. The most recent efforts have been around “Lanikai,” the code name for Thunderbird 3.1 and a beach in Hawaii. Previously, MoFo raised funds for the lemurs, in support of “Namoroka,” the code name of Firefox 3.6.
For a list of Firefox code names and potential future code names, see the Mozilla wiki page.
Man, your sources are better than mine! Where’s the cite for this?
Bug 585751.