html - iframe contents cant appear in Firefox

Question

Below is my code:

<div style="border: solid 1px #000000; margin: 5px;">
  <iframe src="http://www.w3schools.com" width="100%" height="300px" scrolling="yes"><p>Your browser does not support iframe.</p></iframe>     
</div>   

Contents of iframe works well in chrome but not in firefox. I've disabled add-ons but my iframe is still empty. Can anyone please help me?

Answer 1

If you are trying to add this Iframe on a SSL-encrypted website (https://), it won't work any more since Firefox 23 because Mozilla has decided to blocked all unencrypted content on encrypted websites (for example http-iframes on https-websites). You can change this behaviour in your own Firefox installation by typing about:config in the address bar and setting security.mixed_content.block_active_content to false. But that won't help you for all other FF23-visitors on your website.