Today Mozilla launched the next phase of the Mozilla Labs Apps Project. You can read all the details about the Apps Developer Preview and Documentation on the Hacks blog. Below is an excerpt:

“As part of Mozilla’s mission to make the Web better we believe that apps should be available on any modern Web-connected device, operating system or browser…To get started, sign up for the Mozilla Labs Apps Developer Preview, where you can test the features of the marketplace app-submission and sale process.”