Scenario:

• page1 contains a hyperlink which opens page2 in a separate tab.
• page2 loads content in an iFrame

Both pages and the iFrame content are from the same domain.

If the hyperlink in page1 has target="_blank" rel="noopener noreferrer" then the iFrame in page2 can access window.parent. If the hyperlink in page2 has target="my-tab-name" then the iFrame in page2 crashes when it tries to access any properties of window.parent.

This does not happen in chrome, it only happens when the page is loaded in a CefSharp browser. I inherited the C# code so I don't know if I'm missing some settings, but I can't see anything obvious.