Why can't I view --> page-source of an iframe? How can I make iframe contents viewable?

Question

When I load a page that has an iframe, often (perhaps always) I can't see the content of that iframe using the browser's View --> PageSource menu choice. Two questions:

1. Why should the iframe's content be unviewable?

2. How can I change my html or css so that it is viewable?

EDIT: @diEcho and @JohnP answered the second question (thanks, guys!) but the first question remains:

How come the iframe's content is unviewable in the first place?

Thanks!

Answer 1

In Firefox, you can right click inside the iframe and select This Frame -> View Source and you can view the source of the iframe.

And in Chrome, it's View Frame Source

Answer 2

if using firefox then install Web developer addon ..there is option to see page source of specific iframe...

HAPPY TO HELP