[detaro]

Sensitivity of data? I'd associate "spyware" with "collects personal information", whereas studies that do not require explicit opt-in are only allowed to collect things on a level of "how many tabs are open", "has the user enabled this feature", and things like web browsing history or data derived from the history are explicitly excluded. If you don't trust Mozilla to hold that standard, then yes, you probably shouldn't use their product.

(Which apparently played part in the Mr Robot idiocy: since it didn't collect any data, it was easy to get it through the process...)

I don't like lots of stuff Mozilla is doing, but I trust them more than the alternatives to actually do what they claim privacy-wise.