Silently opting users into ad telemetry data collection is pure evil and makes me sad to see, given how awesome and pro-indidual M used to be.
- Syndication feed (RSS/ATOM) "sniffer" (or whatever the hell it was called).
I know that's 2 things but I couldn't choose between the two in enough time.
Last I checked about:config did not work for me on stable android firefox .