<iframe> inside ShadowDOM will cause extension script hang

[gdh1995]

Platform: Chrome 94, Win 10 / macOS 11.4
Extension: Katalon Recorder (Selenium tests generator) 5.5.4.8

One line description

If a page creates a Shadow DOM tree and then insert <iframe></iframe> into the tree, then this extension's content script will enter a dead loop and the whole page hangs.

Test steps

A simple test is: install Vimium C (https://github.com/gdh1995/vimium-c) and press / on a Google page. If without this extension, Vimium C should show a small input box at the bottom right corner and a user can type letters to search.

But with this enabled, a test page will hang (as reported in gdh1995/vimium-c#457).

Buggy point

katalon-recorder/content/recorder.js

Lines 89 to 98 in d118f95

	while (currentWindow !== window.top) {
	currentParentWindow = currentWindow.parent;
	for (let idx = 0; idx < currentParentWindow.frames.length; idx++)
	if (currentParentWindow.frames[idx] === currentWindow) {
	frameLocation = ":" + idx + frameLocation;
	currentWindow = currentParentWindow;
	break;
	}
	}
	return frameLocation = "root" + frameLocation;

Here frames won't include child frames inside Shadow DOM trees, so currentWindow won't be updated, and then currentWindow !== window.top is always true.

[minhthanh3145]

Thank you for the report, we'll fix it and include it in the upcoming releases.

[gdh1995]

Any updates?

[greyfx80]

This issue is still occurring with Chrome extension 5.8.1 and my shadow dom that I am attempting to record does NOT have an iframe in it. In fact, it breaks the shadow dom causing the browser to freeze and having to force quit the entire browser without even trying to record. Had to turn off the extension to stop it from breaking the shadow dom. This is occurring on both Mac (Chrome v. 101) and Windows(Chrome v. 89) in either incognito or regular.

[gdh1995]

Hello, could you fix this in a next release? Another user of my extension also met this crash.