Mte90

function getVersion() {
     if (navigator.userAgent.match(/(mobile|tablet)/i)) {
         var ffVersionArray = (navigator.userAgent.match(/Firefox\/([\d]+\.[\w]?\.?[\w]+)/));
         if (ffVersionArray.length === 2) {
             //Check with the gecko version the Firefox OS version
             //Table https://developer.mozilla.org/en-US/docs/Gecko_user_agent_string_reference
             var hashVersion = {
                 '18.0': '1.0.1',
                 '18.1': '1.1',
                 '26.0': '1.2',

Mte90

//With locationbar.visible check if not in a webview (like an open web app)
if (locationbar.visible) {
    //mozApps used for the open web app and with the user agent check if have MObile (used in Firefox OS)
    if (navigator.userAgent.indexOf('Firefox') > -1 && navigator.userAgent.indexOf("Mobile") > -1) {
      //Check Firefox OS
    } else if (navigator.userAgent.indexOf('Firefox') > -1 && navigator.userAgent.indexOf("Android") > -1) {
      //Check Firefox for Android
    } else if (navigator.userAgent.indexOf("Firefox") > -1) {
      //Check Firefox Desktop
    }