The new browser version is bundled with the under-listed features according to the report:
Ability to drag and drop files from the system to the browser: useful for uploading files to Web sites.Extended support for geolocation technology - which provides a Web site with an approximate physical address of the user.
Though earlier upgrades were saddled with compatibility issues on add-on that extend Firefox's features; the new browser version makes some changes. Mozilla has also listed full list of Firefox changes for developers with more details.
Analysts forecasts has it that plans are underway for the release of the final version by the end of the year, with Firefox 3.7 in the first half of 2010 and Firefox 4.0 expected next year.