I got the pop-over notice for the first time today as well... I'm wondering now how they did it. I have firefox set to notify me about updates, but this wasn't

I got the pop-over notice for the first time today as well... I'm wondering now how they did it. I have firefox set to notify me about updates, but this wasn't that. I have telemetry/Normandy/experiments/etc disabled. I hope I can find whatever I have to disable to prevent settings being remotely applied to my browser outside of updates