AMO will eventually require all Firefox add-ons to implement a new data collection permission:
The "/browser_specific_settings/gecko/data_collection_permissions" property is required for all new Firefox extensions, and will be required for new versions of existing extensions in the future. Please add this key to the manifest. More information at: https://mzl.la/firefox-builtin-data-consent
AMO will eventually require all Firefox add-ons to implement a new data collection permission: