There are two preference values that need to be set to true, which is turned off by default in master branch. Need to discuss whether efforts are needed to ensure those preferences are turned on for the release. Without those, Find my device may not work properly (with using FxAccount) They are: user_pref("dom.identity.enabled", true); user_pref("dom.inter-app-communication-api.enabled", true);

Jared Says: those prefs are present in the past release, so I assume they will be included in this one too note also, switching to fxa from persona on native device might mean that some of those prefs aren't needed for instance, if they use the fxa iac helper, as i have done in the settings app, it probably will work anyway since find my device is certified

In case anyone's wondering what it does, dom.identity.enabled tells us whether or not to expose the DOM api for persona and firefox accounts. It should be enabled for b2g, but not for desktop at this point. It is enabled on b2g [1] but not on desktop firefox [2]. IAC is also enabled on b2g [3]. You're correct that we need these. Since they're already preffed on in gecko, are there any further steps that need to be taken? [1] https://mxr.mozilla.org/mozilla-central/source/b2g/app/b2g.js#778 [2] https://mxr.mozilla.org/mozilla-central/source/browser/app/profile/firefox.js#1365 [3] https://mxr.mozilla.org/mozilla-central/source/b2g/app/b2g.js#833

I believe we have the Gaia pref situation well tracked elsewhere