I found this in about:config, defaults to true apparently: privacy.resistFingerprinting.randomDataOnCanvasExtract
But you have to enable privacy.resistFingerprinting
for it to work first. I enabled that and now the EFF test says “randomized” for the hashes but also Lemmy went from dark to light theme somehow.
Once saw a (German) documentary about this building. They have drop-off places on the ground floor where delivery drivers leave their goods in locked boxes. Payment and and locking/unlocking of the box is done digitally through phone.
P.S.: This one https://www.youtube.com/watch?v=PgVXPEORuA0