Firefox fork from the Free Software Foundation. Older versions had some spyware in there, but 60.2 removed all of it as far as I can see. Some privacy addons are included by default (as well as the annoying LibreJS), but you should still use uMatrix - though newbies might like having some privacy built-in. Though it is made by more ethical people, this browser still suffers from many of Firefox' ills - like the shitty UI, resource usage (actually, it only takes 120MB RAM, much less than other FF forks - probably because of the old version), lack of configuration, the deprecation of XUL addons etc. All in all, IceCat fixes many Firefox issues but leaves more of them in - and it can't be otherwise since they are fully dependent on Mozilla's decisions in the end. UPDATE: it's fucking August 2020, and the latest release of IceCat is still version 60.7 compared to Firefox 79. Packages for most distros are also not provided, so you'll have to compile. I recommend skipping this one especially in light of the recent happenings at Mozilla. UPDATE July 2023: 60.7 is still the most recent officially supported release, wow. Obviously I don't recommend bothering with it, with how many exploits surely exist for that version at this point already. And it is still just Firefox with the spying removed, so there is not enough advantage to justify it.