iframes are not blocked

[GoogleCodeExporter]

Is this extension supposed to block iframes? If so it doesn't. 

What steps will reproduce the problem?
1. go to http://www.quirksmode.org/iframetest.html
2. The iframe is loaded correctly - shouldn't it be blocked?
3.

What is the expected output? What do you see instead?
expected: no iframe
what i see: writing "Test page in iframe"

What version of the product are you using? On what operating system?
Windows 7 x64, newest Chrome 37, addon version: 1.0.0

Original issue reported on code.google.com by [email protected] on 20 Sep 2014 at 10:46