Firefox 3.0 is now officially listed in Guinness Book of World Records. They started up a campaign calling Download Day 2008 before download day started and set up a record of over 8 million downloads in 24 hours on 18th june 2008.

As the arbiter and recorder of the world’s amazing facts, Guinness World Records is pleased to add Mozilla’s achievement to our archives,” Gareth Deaves, records manager for Guinness World Records, said in a statement. “Mobilizing over 8 million Internet users within 24 hours is an extremely impressive accomplishment and we would like to congratulate the Mozilla community for their hard work and dedication.

Till now there total downloads reached limit of “28,401,344″ and they are showing the worldwide download map at their Official Website