Looking at the bug https://bugzilla.mozilla.org/show_bug.cgi?id=925404, it seems that we'll need to expand ```details``` to this: 
```
var phoneNumber = carrierTag.querySelector('.phone-number'),
    phoneCarrier = carrierTag.querySelector('.phone-carrier');

phoneNumber.textContent = 'number';
phoneCarrier.textContent = 'carrier';
```
I guess we'll need two separate localizable separators: ```type->number``` and ```number->carrier```;