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.
Removed by mod
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.