1. Switch Mozilla's default browser component from the XPFE-based Navigator to the standalone Phoenix browser.

2. Develop further the standalone mail companion application to Phoenix already begun as Minotaur, but based on the new XUL toolkit used by Phoenix (this variant has been codenamed Thunderbird).

3. Deliver a Mozilla 1.4 milestone that can replace the 1.0 branch as the stable development path, then move on to make riskier changes during 1.5 and 1.6. The major changes after 1.4 involve switching to Phoenix and Thunderbird, and working aggressively on the next two items.

4. Fix crucial Gecko layout architecture bugs, paving the way for a more maintainable, performant, and extensible future.

5. Continue the move away from an ownership model involving a large cloud of hackers with unlimited CVS access, to a model, more common in the open source world, of vigorously defended modules with strong leadership and clear delegation, a la NSPR, JavaScript, Gecko in recent major milestones, and Phoenix.

原文出處： http://www.mozilla.org/roadmap.html