A place to discuss the news and latest developments on the open-source browser Firefox
None.
I don't think it's a good idea to take some huge collection of prefs and just apply them blindly.
Instead, make the changes that you actually want to do, so that you actually know what changes you are causing. If you want to put those into your user.js file then feel free, but in my opinion it's just better to change them in about:config directly - that is, unless you need to apply the exact same set of changes to multiple profiles.
Right, and that's fine. The one good thing about these "collections" is when they describe what the pref does (I mean, so does official source typically). But that matters only as long as the audience actually reads those descriptions. But then if you just pick the ones you actually care about (which you should totally do) it becomes irrelevant from which "collection" you found about it from.
Same. I'm using betterfox and liking it so far.
The good thing is every configuration is well documented so I'm confident to make the changes myself (like enable back account sync - it's super useful but I don't know why it was disabled in the first place).
Betterfox. Never really had an issue with it.
I've also tried Arken before and oh boy is it a pain to go through. If I needed something as extreme as that, I would probably just use Tor.
Arkenfox is now a bit more user friendly. It also has a wiki with overrides for the more annoying stuff. Setting it up is a bit tedious, but I guess most advanced users will be interested in using overrides anyway.
It would probably be easier to just use librewolf, which is almost the same but disabling some annoying things and adding gui switches for some of them.
I use Firefox Profilemaker.