It’s the scratchpad script where you copy/paste into the about:config console. I just did it for the new v.115 release. I’ve done it previously but I don’t have any set schedule. I guess 1x every six months (2x/year) seems sufficient but I wanted to see what others do.
Ever since mullvad-browser came out and I saw the Arkenfox main developer basically endorsing it as the next logical evolution of Arkenfox… I’ve only been using mullvad browser, no need to do updates.
Mullvad is great for people who don’t want to tweak their browser settings very much. But lots of us see the tweaking as a feature, not a bug. I customize the heck out of my browser and appreciate that FF allows for the customization.