how to display web page of https orgin inside html page

Is it possible to embed https content inside html page? I tried iframe but it shows message

“Firefox Can’t Open This Page

To protect your security, <example.com>(of the https) will not allow Firefox to display the page if another site has embedded it. To see this page, you need to open it in a new window.”

And it provides the https link which when clicked opens in a new browser and web page of the https orgin gets displaued. But I want to have it embedded inside html page.