I think in essence the way things work, compared to the way they used to, is a giveaway.

FireFox now loads amazingly slowly if my broadband is connected (lights flashing), and almost instantaneously if not. Now convince me the the new owner is not trawling for data, when I don't even have his (or anyone's) magic gizmos. Like password pockets.

The computer shop I got the new PC from (not this one) said he installed a better browser written by the original FireFox boffin (?) because "he didn't like the direction the new owner was moving FF" - I paraphrase (lightly).