Ļoti daudzos žurnālos un visādos portālos/vortālos spekulē ar dažādiem cipariem, kas ieripo Mozillas kabatā. Tā kā Mozilla ir bezpeļņas organizācija, tad atbilstoši likumdošanai, šai organizācijai ir jāaizpilda speciālas formas kurās ir jāuzrāda ienākumi. ZDNetā ir labs raksts par šo tēmu.
Mozilla’s 990 form, which was filed in November 2005, states that it made $5.8m in 2004, of which $4.9m came from services it charged for, which will include revenues from Google ads. Its expenses that year totalled $2.3m, of which $1.5m went on employee wages. This works out as approximately $100,000 for each of the 14 employees it declared on the form. The Foundation ended the year with net assets of $5.7m, an increase of $3.5m over the course of the year, according to its filing.