Another place to start: Privacy Guides has a history of tracking quite a variety of computer networking tools (browsers, data providers, Internet services, software, hardware, desktop and phone, even operating systems),
blurg
One of the greatest advantages of the totalitarian elites of the twenties and thirties was to turn any statement of fact into a question of motive. -- Hannah Arendt
The EU has such, General Data Protection Regulation (GDPR), works reasonably well. Pretty good place to start.
Desktops, tablets, phones: Kiwix can use a bunch of reference works downloaded to your machine(s), from Wiktionary to the 100 GB Wikipedia (with thumbnail pics) to Gutenberg books.
might
That word is carrying a mighty big load.
What's one that doesn't suck?
Disappointing ending? As Above, So Below? Oh I'm sorry but...
spoiler
ending with the world turned upside-down and yet the same as before is entirely consistent with the alchemical, Enlightenment, philosophical, and psychological recognition of opposites, of turning things around, of viewing difficult (e.g. your worldview) and seemingly easy (e.g. memories) subjects from another perspective. Remember where some of the journeyers were interested in the room of gold, and others in the wall of symbols? That's the metaphor for the ending.
Looked at this way, the ending is thrillingly deep. Seriously, once Dick Gregory's observation* is understood, this movie encourages an irreplaceable insight. It's a trip though, you're right about that, from "riding high," as you say, to the darkest of depths, which is all-too-easily missed. Good flick, give it another go; the movie is the ride, the ending is the worthy destination.
- "Before you argue with someone ask yourself: Is this person mentally mature enough to grasp the concept of different perspective? If not, there is no point to argue." — Dick Gregory
True in a way. However, there is a rather large collection of speculation on the Internet that is quite an undertaking to correct. And a large population of people and bots willing to speculate. Also, having once been speculated, each speculation takes on a life of its own. If it gets much more substantial, forget Skynet, we're busy creating Specunet and its sidekick Confusionet -- an insidious duo.
Sadly, Syncthing is dropping Android support.