The merges for Firefox 7 onto the Beta Channel, Firefox 8 onto the Aurora Channel as well as Firefox 9 onto the nightly channel has been completed. You can move to the next version within your channel (Firefox 7 Aurora to Firefox 8 Aurora) by going to (Auroa (or Beta or Nightly) Button > Help > About Aurora (or Beta or Nightly). If you want to update manually you can get the builds here:
- Nightly (Firefox 9.0a1)
- Aurora (Firefox 8.0a2) Mobile Version available here as well
- Beta (Firefox 7.0b1) Mobile Version available here as well