Firefox for Android is one of the most important projects we localize at Mozilla. Localization takes place in the pre-release channel called Aurora. Each version spends 6 weeks in Aurora, giving you same amount of time to complete localization. To test your localization, you can download new Aurora build every day.
NOTE: In order to complete Android work entirely, strings in files that are shared with Firefox Desktop must be localized as well. These can be found in your locale's Firefox Aurora folder. They correspond to all file paths that start with dom, netwerk, security, services and toolkit