Aggiornamentilumia.it reports that Microsoft is testing a new feature in the latest builds of Windows 10 Mobile Redstone 2.
The feature adds a new menu item to Microsoft Edge which would activate Cortana and lets you set up a reminder for something related to the current web page e.g. a memo to yourself or to share with others. The Cortana reminder is pre-filled with those items and includes the url and a short excerpt of the web page.
See a video recorded by Aggiornamentilumia.it of the feature below:
While the feature is in testing we do not know if it will make public builds or will eventually be included in the official update next year.