The Tor Browser is a web browser capable of accessing the Tor network. It was created as the Tor Browser Bundle by Steven J. Murdoch and announced in January 2008. The Tor Browser consists of a modified Mozilla Firefox ESR web browser, the TorButton, TorLauncher, NoScript and the Tor proxy. Users can run the Tor Browser from removable media. It can operate under Microsoft Windows, macOS, Android and Linux. Taken from Wikipedia.
No Terms of Service, Privacy Policy, or EULA. Now that's anonymity for you.
It's literally Tor Browser.
It doesn't even log anything.
It's a modified fork of Firefox with NoScript installed and enabled. I'd advise against installing any more extensions and just use it as is.
These guys have way too many sponsors to be honest. Although they include Google and the US Government, I don't believe they are backed by them.
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Analysis: Someone broke the 100 mark, I repeat someone broke the 100 mark. A whopping 140 gives Tor Browser the highest SPT Score achievable and I believe it will keep that score for as long as humanly possible. Tor truly is the most private way to connect to the web and deserves every single credit it gets (even the criticism I guess). That being said, Tor doesn't automatically give complete anonymity. If you log in with an account with PII (Personal Identifiable Information) or an account that wasn't created via the Tor network then websites can pretty much know who's behind the screen without even trying to break down the connection. Furthermore, the US Government has broken the Tor connection in the past so there isn't a complete guarantee of you being safe from entities with enough dedication and resources to actively track you down (even if the article I linked is pretty old). But unless you're a high profile criminal of sorts then you probably shouldn't have to worry as it's usually enough to stop mass surveillance tools dead in its tracks. Recommended if you really want as much privacy when browsing the world wide web as possible (I wouldn't recommend it for daily use however, as onion routing can really slow down internet speed).