Every day, Mozilla developers write code that is merged into a common code repository (mozilla-central) and every day that code is compiled so as to create a pre-release version of Firefox based on this code for testing purposes - this is what we call a Nightly build. Once this code matures, it is merged into stabilization repositories (Beta) where that code will be polished until we reach a level of quality that allows us to ship a new final release version of Firefox to hundreds of millions of people. This development process used to ship a new version of Firefox every 5 to 8 weeks is called the Train Model.
Cata die, le disveloppatores de Mozilla scribe codice que es inserite in un repositorio de codice commun (mozilla-central) e cata die ille codice es compilate pro crear un version preliminar de Firefox basate sur iste codice pro propositos de test - isto es lo que nos appella un compilation Nightly. Un vice que iste codice matura, illo es inserite in repositorios de stabilisation (Beta) ubi le codice essera affinate usque nos attinge un nivello de qualitate que nos permitte de inviar un nove version final de Firefox a centenas de milliones de personas. Iste processo de disveloppamento usate pro emitter un nove version de Firefox cata 5 - 8 septimanas se appella le Modello del traino.