<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Dummy iFrame page</title> </head> <body> <h1>iFrame CSP test</h1> <iframe id="theIframe" sandbox="allow-scripts" width=800 height=800 src="http://example.org:8000/browser/browser/base/content/test/about/csp_iframe.sjs"> </iframe> </body> </html>