This extention is the AGOL Assistant's Assistant!
The extention creates a button on each of your ArcGIS Online items' summary page which opens the item up in ArcGIS Assistant.
The extention is designed for Chromium based browsers (Edge, Chrome, etc).
This extention can be added to your browser via the extentions dev mode from code. I plan to make this available on the Chrome extention store in time.
This extention is in no way affiliated with ESRI and provided simply as a tool to assist managing your content.