My embedded form is not working across all browsers

Our wordpress site with an embedded iframe form doesn't show the entire form (thus there is no submit button) in Firefox, but it works in Chrome and Safari. When I use the Wordpress script, it works in Firefox, but not in Safari.

Looks like the script part of the iframe creates a conflict in your website when it's accessed through Firefox. In this case, I would suggest removing that. Here's your iframe code:

<iframe id="JotFormIFrame" onDISABLEDload="window.parent.scrollTo(0,0)" allowtransparency="true" src="//form.jotformpro.com/form/21765635924966" frameborder="0" style="width:100%; height:7812px; border:none;" scrolling="no"></iframe>

<script type="text/javascript">window.handleIFrameMessage = function(e) {var args = e.data.split(":");var iframe = document.getElementById("JotFormIFrame");if (!iframe)return;switch (args[0]) {case "scrollIntoView":iframe.scrollIntoView();break;case "setHeight":iframe.style.height = args[1] + "px";break;case "collapseErrorPage":if (iframe.clientHeight > window.innerHeight) {iframe.style.height = window.innerHeight + "px";}break;case "reloadPage":window.location.reload();break;}};if (window.addEventListener) {window.addEventListener("message", handleIFrameMessage, false);} else if (window.attachEvent) {window.attachEvent("onmessage", handleIFrameMessage);}</script>

Simply remove the codes that are highlighted with yellow. 

Also, try using our WordPress plugins such as:

https://wordpress.org/plugins/embed-form/

https://wordpress.org/plugins/jotform-oembed/

Try using the Embed Form plugin first and if that is not working, please try the oEmbed plugin. But I'm sure the Embed form will work.

The shortcode will be [jotform id="21765635924966"].

Thanks