Even with all telemetry disabled (including the option "Allow Firefox to send technical and interaction data to Mozilla") and without anything showing on that page, the browser still sends out interaction data by means of so called "pings", URL parameters, etc.
Even with all telemetry disabled (including the option "Allow Firefox to send technical and interaction data to Mozilla") and without anything showing on that page, the browser still sends out interaction data by means of so called "pings", URL parameters, etc.