From the creator of arkenfox.js

AF (arkenfox) vs LW (librewolf) AF enables SB (safe browsing) and uses mozilla’s API key. LW doesn’t have a SB key (edit: note AF does block real time binary checks) AF updates same as Firefox. LW has no updater in windows AF can use any language, LW is limited to en-US AF restricts cross-site referrers by default LW ships with uBO - AF users have to do that manually and add/flip the two recommended filters as per the AF wiki So basically everything you see at Arthur’s independent test site at https://privacytests.org/ for LW applies to AF along with referrers (navigational) with a green check as well

https://github.com/mullvad/mullvad-browser/issues/1

Probably not, unless the military is hiding some next level tech.

For example, the current generation of detectors, nearly all of which weigh upwards of a ton, have to be placed within tens of meters of a reactor’s core—inside a facility’s fence.

https://physics.aps.org/articles/v13/36