LinkMozilla is moving forward with the ambitious new release schedule that it showcased a few weeks ago. As it was getting closer to releasing Firefox 4, it became clear that things had to be sped up to bring new features to users as well as make it easier for developers working on Firefox.
More details about the new release channels were made available recently, including the channel names and logos.
There will now be four channels in total, Aurora being the new one created for experimental releases. As work on Firefox 5 has already started, the first Aurora build, or rather the merger of mozilla-central (Nightly) with the mozilla-aurora channel, has now been released.