You can find a more in depth conversation on this (arkenfox additions and shortcomings vs what mullvad specifically does) here: https://github.com/mullvad/mullvad-browser/issues/1 and here https://mullvad.net/en/browser/hard-facts
I was mostly referring to some similarities between Mullvad and arkenfox’s base profile
Quite a lot of it is tor stuff with (edit:) some arkenfox slapped on. Most of the config are Tor base, Ublock added, and it has a New Identity feature that is similar to Tor. Biggest benefit is being able to use a comparatively much speedier VPN with it over Tor’s proxies. For the most private setup, you should run it stock with Mullvad’s VPN service, but I’ve found it works great with Proton VPN and IVPN as well. Personally, I have very sensitive eyes so I cannot run it with only stock, I need Dark Reader and uBlock at the minimum, and Sponsorblock and anything else is simply a nice thing to have.
I’ve been testing it on many sites and the amount of extra info from addons is very small and few sites keep track of it in my real world testing. It is readable though and a few can notice the difference, and its mostly financial sites that you need to use real ID for anyways.
They do not unfortunately, I desperately wish they did. The best options on mobile right now for a Firefox based privacy browser are IronFox and Tor Browser for Android. Personally, I don’t think either of these are as polished and as snappy as Mullvad Browser on desktop. I think the chrome based browsers are more battery efficient as well, so its unfortunately best to go with them for now I think if you want privacy and efficiency at the same time. Of course, if you want to maximize anonymity you should always run base Tor Browser, but it is not fast and suitable for daily browsing imo, Tor Browser is for specific use cases where you need to maximize anonymity or to change IP from your vpn or local ip for some reason.
If I were to recommend an Android browser, it’d probably be GrapheneOS’s Vanadium (can only get it stock on Graphene) with RethinkDNS’s adblocking and tracking filters and Cromite barring that. Neither of these are as good as Mullvad Browser on Desktop in terms of its speed and privacy benefits, though. Mullvad Browser is truly the crème de la crème for everyday sensible privacy use cases.
I’ve learned how to get under rich people’s skin and in my free time when I’m bored I harass them. It’s an unguilty pleasure of mine. It brings me great joy to see a multimillionaire or a transphobe so pissed about something I said that they complain to spez to get me banned.
I also just have a general interest in security and privacy, sometimes I just do things like spam an ad site to see how long it takes to react.