Sitecore Marketplace apps now support a new permission that allows file downloads to the user's computer. This is relevant for apps that let users export files, such as analytics data in CSV or PDF format.
You can enable this permission during app configuration in App studio. If disabled, your app's download functionality will not function.
Note the following about Marketplace app permissions:
Enabled permissions are listed when installing an app.
If permissions change for an app that's already installed in an organization, an admin or owner needs to update the app in My apps for the changes to take effect.