Unlike many Firefox forks, it tracks modern Firefox. I believe they run a similar set of tweaks to Tor browser, just without the Tor. This is quite nice. It’s autoplay blocking has actual teeth: I’m delighted when YouTube’s annoying autoplay-next-video is foiled by it.
Since it is smaller and from a less well-known group of developers, I can totally understand this being untenable. But the added risk is worth it for me, because while it isn’t perfect, it feels like I have gotten a little slice of control back with it.