For SMS, we're using "sms" as its permission name. How about MMS? Possible options: #1 Let MMS reuse the current "sms" permission. #2 Create a new "mms" permission for MMS specific. #3 Create a new "mobile-message" permission but only let MMS use it for now. #4 Create a new "mobile-message" and let both SMS and MMS use it from now on. Note that #4 will break the compatibility with Gaia.

I think we should either do #1 or #4. Up to you which one.

I think "sms" or "sms-mms" would be two good permission names. I am not a big fan of "mobile-message" because it is way too vague. Whatever we do, there is no reason to have different permissions for SMS and MMS so the permission should apply to both.

Thanks Jonas and Mounir for the suggestions. I'd prefer taking the existing "sms". We can revisit to change that with a more generic name if needed.