Chrome
- Go to the Manage Extensions page: chrome://extensions/
- Find the FCM Extension
- Click Details button
- Scroll down and look for Source
- Source - Chrome Web Store: the extension has been manually installed from the Edge Store
Edge
- Go to the Manage Extension page: edge://extensions/
- Find the FCM Extension
- Click the Details link
- Look for Source
- Source: Microsoft Edge Add-ons Store: the extension has been manually installed from the Edge Store
If Source mentions IT, then the extension was deployed to your machine by your company's IT team.