``` var obj = document.createElement('object'); Object.defineProperty(obj, 'contentWindow', { value: null }); document.body.appendChild(obj); obj.data = '/'; obj.contentDocument.defaultView.alert(1); ``` Basically workaround [`chromium_bug_workaround.js`](https://github.com/LavaMoat/snow/blob/e6359c3b9306de84c12b157e5de2bec80c74a3d1/src/chromium_bug_workaround.js#L21) :) should be easy to fix using [this](https://github.com/LavaMoat/snow/blob/e6359c3b9306de84c12b157e5de2bec80c74a3d1/src/natives.js#L162)