I have written the following code in the background.js file of an EDGE Extension:
browser.windows.create({"url": request.openUrlInEditor, "incognito": true});
It throws error saying 'incognito' property is not recognized/undefined. If I remove the 'incognito' property then it works - opens the window but not in private mode. As per the MDN API the 'incognito' property is suppose to work on EDGE. It is working with Firefox browser tho.