@ferjm I ran jshint against this file (fxam_coppa.js), the list of errors is:

```
apps/system/fxa/js/screens/fxam_coppa.js: line 19, col 7, 'FxaModuleUI' is not defined.
apps/system/fxa/js/screens/fxam_coppa.js: line 22, col 5, 'FxaModuleUI' is not defined.
apps/system/fxa/js/screens/fxam_coppa.js: line 25, col 30, 'FxaModule' is not defined.
apps/system/fxa/js/screens/fxam_coppa.js: line 41, col 5, 'FxaModuleUI' is not defined.
apps/system/fxa/js/screens/fxam_coppa.js: line 57, col 26, 'FxaModuleStates' is not defined.
apps/system/fxa/js/screens/fxam_coppa.js: line 12, col 19, 'FxaModuleCoppa' is defined but never used.

6 errors
```

You can fix this by declaring globals and exporting the module, just do this somewhere at the top of fxam_coppa.js:

```
/* global FxaModuleUI, FxaModule, FxaModuleStates */
/* exported FxaModuleCoppa */
```

Note also that I've fixed the rest of the jshint errors in the fxa system app, see my pull request https://github.com/mozilla-b2g/gaia/pull/16933 (bugzilla bug 980184)

:beers: