bonus points if you want to put a `sort()` into the mix for a-z keys.

```javascript
Object.keys(messagesJson).sort().forEach(function (key) {
```

```
...
ca 124 / 131
- Missing strings:
    client.json: Attempt limit exceeded. Try again later.
    messages.json: Are you sure?
    messages.json: Congratulations!
    messages.json: For more information, please visit <a href='https://support.mozilla.org'>Mozilla Support</a>
    messages.json: For more information, please visit https://support.mozilla.org
    messages.json: Privacy Notice
    messages.json: Terms of Service
...
```