Yes, the latest version of Mozilla's web browser comes out today (17th June) and this time the creator are trying to set a world record. They want to get the most dowloads in a 24hr period. Wether you use Firefox or not I think everyone should download it just to help support open-source companies and to reduce IE's dominance in the market.
The new version will be released at 17:00 GMT (which is 10:00 PDT, 18:00 BST, 19:00 CET and I don't know any others) and you can download it from Firefox website.
EDIT: The time has past and you can now download it.