Add Spanish (Mexico) locale
Merge pull request #2696 from alpha-omega/master

Add Spanish (Mexico) locale
Implements the print permission
Merge pull request #2697 from vyv03354/bug792816

Implements the print permission
Reverts 729b82, d5f65f and 724add
Merge pull request #2700 from yurydelendik/disable-protection

Addresses https://bugzilla.mozilla.org/show_bug.cgi?id=792816#c12