At Mozilla the trains run on time. The open source group is out with its second rapid release browser today, providing users with improved functionality and performance.Firefox 6, which is being officially released by Mozilla today, follows Firefox 5, which debuted in July. Both Firefox 5 and 6 are part of Mozilla's new rapid release cycle, which aims to deliver more browser updates with incremental features. Previously Mozilla had released major browser update on a less predictable cycle with long with development cycles of a year or longer in between releases.While the new rapid release cycle does not present the...