This addon makes use of the service "Simplepush", operated by a third-party at https://simplepush.io . Its privacy policy can be found here: https://simplepush.io/privacy . All transmission is done over HTTPS. Foxpusher does not use Simplepush's device password encryption for notifications (aka "E2E encryption").

Upon explicit use ("Push to device" is clicked), the addon transmits the selected tab or link's URL to api.simplepush.io. By default, the link or tab's title is also supplied in the notification, however this can be turned off in the settings. None of the data is logged or analyzed by Foxpusher, and is sent as-is directly to Simplepush. (Which may conduct additional processing according to their privacy policy, linked above)