ajax call error(mixed active content) in firefox

$.ajax({

type: "POST",

url: ScriptVariables.Get('UrlLoadSkills'),

data: { job_did: ScriptVariables.Get('jobdid'), skill: myskills },

cache: false,

contentType: "application/json",

dataType: "json",

success: function (data) {

var parsedData = JSON.parse(data)

//console.log(parsedData)

var success = parsedData["Success"]

if (success == true) {

error
--------

Mixed Content: The page was loaded over HTTPS, but requested an insecure frame http .

This request has been blocked; the content must be served over HTTPS.