Determine if Internet Explorer is in private browsing mode from extension

Is it possible to detect private browsing mode on Internet Explorer using Forge Trigger.IO's framework from an extension?

EDIT

I am looking for something similar to Firefox's nsIPrivateBrowsingService or to Chrome's chrome.tabs API's incognito check.

Conclusion

• Extensions indeed can run on inPrivate Mode if the option (OFF by default) to enable extensions inPrivate Mode is ON.

• There is no way of getting this information using Trigger.IO's framework at this moment.