My panasonic non-android (something based on firefox-os I think) has a setting to not load related online-data when switch to a channel until explicity pushing

My panasonic non-android (something based on firefox-os I think) has a setting to not load related online-data when switch to a channel until explicity pushing a button to do so. That option was added in the most recent update. However, it also has some built-in netflix/prime/youtube/... apps. And I have seen at least some network traffic that seemed realated to those, even though I never started them. Maybe just loading updates, maybe leaking data. I don't know. I didn't check since the last update though. It's not perfect, but seems much less bad than most others.