The second beta version of Firefox, offered for download from today (July 28), allows us to have an overview of the features which will integrate 4th version.
The main feature is the ability to create tabbed dedicated to Web applications, such as a mailbox, which will be start with the browser and constantly present in a dedicated area. Very useful when we know the potential of the Webmail now.
The final version also provides better management style sheets, a new management system extensions and changes on the style of the software.
It is not known yet whether the levels of speed, if that version will arrive to catch up on Chrome and especially Opera.