This app is designed to help you figure out what permission your extension is asking for. The screenshot in each tab shows you the exact permissions the extension is requesting.

Permission Informer has two tabs:

The first tab shows you the list of all the extensions installed on your device. You can use this list to search through the list of extensions, and you will find all the permission information for the specific extension.

In the second tab, you can see the list of all the permissions that are used by your current browser. The permissions are listed in groups, so you can understand what the extension is doing.