jason Reporter
	Description • 9 years ago

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150807085045

Steps to reproduce:

1. Create a page with a sandboxed <iframe> that uses a keydown event handler to preventDefault() on Backspace (to prevent accidental Back navigation)
2. Navigate to the page from Step 1
3. Click inside the sandboxed <iframe>
4. Hit the Backspace key


Actual results:

Back navigation!, even though top-level navigation should be disallowed due to sandbox attribute. And top-level document's onkeydown event was not raised, making the top-level navigation unpreventable. Since the iframe is sandboxed, I can't add script in the iframe's document to detect Backspace key unless I use sandbox="allow-scripts".


Expected results:

If Backspace key inside an <iframe> can perform top-level Back navigation, then that key event should be observable (and preventable) within the context of the top-level window (and/or be observable on the <iframe> element itself).

	jason Reporter
	Comment 1 • 9 years ago

Same behavior in IE and Chrome as well.

Chromium bug report:
https://code.google.com/p/chromium/issues/detail?id=522120

	Chris Rebert
	Comment 2 • 9 years ago

Related: bug 1041377