Mozilla-europe.org, with the recent addition of its Turkish and Portuguese versions has just passed the mark of 20 languages. This has happened a few hours before Xiti Monitor announced new Firefox usage numbers in Europe. Pascal Chevrel, from Mozilla Europe, has done the math and gives an estimate of 37.4 millions Firefox users for Europe (his post is in French, but I hope to convince Pascal to whip up an English version of his analysis soon).

Map of Europe with Firefox usage

Source: Xiti Monitor

As usual with Xiti Monitor's studies, these are numbers that were measured on a Sunday, so usage of Firefox during week days is probably lower by a margin of 2 to 3 percentage points.