Investigate exceptions reported by Microsoft Dashboard for Microsoft Edge

[oleksandr]

Microsoft has recently added telemetry to report exceptions happening in Edge Extensions on the Developer Dashboard. The functionality is only available in Windows 10 Insider Builds for now, so we only have data from those. As of now, we have quite a few exceptions, and there are 2 exceptions that are responsible for 99% of those. I am attaching a stack trace for each of those exceptions here.

We need to investigate what is going on, and what needs to be done, so that we don't have so many exceptions reported in the Dashboard.

[oleksandr]

Most likely the cause is Access Denied error in include.preload.js on line 2114:

  let sandbox = window.frameElement &&
                window.frameElement.getAttribute("sandbox");

I have found it on WSJ website, for example here:

​https://www.wsj.com/articles/maersk-tankers-turns-to-wind-power-to-cut-soaring-fuel-costs-1535641239

[sebastian]

Would wrapping .getAttribute("sandbox") in a try/catch block silence that error?

[abpbot]

A commit referencing this issue has landed:
​Issue 6914 - Wrap window.frameElement in try catch to silence Microsoft Edge exception