I'm using a plugin, and the docs say to use the following script:
<script type="text/javascript" src="https://cdn.emailjs.com/dist/email.min.js"></script>
<script type="text/javascript">
(function(){
emailjs.init("user_X");
})();
</script>
But in Firefox, and only Firefox I'm getting:
ReferenceError: emailjs is not defined
UPDATE:
Looks like it's having a certificate issue:
cdn.emailjs.com uses an invalid security certificate.
The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported.
(Error code: sec_error_unknown_issuer)