Good tool, but I am sure there will be a lot of bounty beggar who will use this tool to automate scanning for vulnerable small blogs / website for iFrame / clickjacking , and then send email to the website owner saying they have discovered "high impact security issue" and begging for bounty.
This is cool. I noticed that, after testing a few URLs, hitting the back button in my browser popped some state to load the previous iframe URL, but the URL of the whole page itself didn't change. It would be nice if the URL had a query param to reflect the currently shown iframe URL.
Yes, it sends the url to webfuse.com for the proxy test and to a ws21.webfuse.com host for a session data that also contains the url. They also open a web socket to ws21.webfuse.com that also contains the url.
Ooh, and to example-org-p.webfuse.com to actually fetch the content for the proxy.
It's totally a lie that URLs are processed client-side only.