View source for L10n:Firefox in 2016/For Localizers

While [[L10n:Firefox in 2016]] has been written with a focus on developers, let's rephrase this for Localizers.

We'll be talking about Firefox Desktop and Firefox for Android here. Thunderbird/Lightning and SeaMonkey would need to follow this, too. Other applications (iOS, for example) and websites are not affected.

This plan is based on various conversations that we had with you on our Hackathons in 2015, as well as conversations with the [[Firefox/Technical Architecture Group]] and a session in mozlando with stakeholders from Firefox, Build, Release.