> Tor Browser is terrible for security
[citation needed]
The exit node can't do anything your ISP can't. Meanwhile you can choose the exit node, which you often can't for your ISP, which means you can choose one operated by someone you trust.
And even if you don't, what are they going to do to a TLS connection?
> and I don’t think Firefox started doing tracking prevention before Safari did
Tor Browser is based on Firefox, so the anti-fingerprinting work they do regularly gets merged back into Firefox proper. Moreover, Firefox has had some of the best anti-tracking addons since forever, but you can only have those if you actually have Firefox.
But Tor Browser is still more stringent about certain things, e.g. they always reset the window to a standard size when you open it so the page can't track you based on that, which Firefox itself doesn't do because it's kind of annoying to the user. Which is another reason why there is benefit in having multiple browsers -- they each have different trade offs.
> They have a different business model but I’m not entirely clear on what their technological innovation is?
They do a lot of good work on ad blocking, and are willing to be a lot more aggressive about it, since it aligns directly with their incentives.