Make entry guard persistent across reboot
Tor uses entry guards  to make some deanonymization attacks harder. We currently don’t have this in Tails, because it would allow location tracking of Tails users by observing which guard nodes are used, which would be a severe regression and render the MAC randomization feature useless.
See  for thoughts on the location tracking problem and an attempt to find a compromise between protecting against location tracking and deanonymization attacks.
Parent Task: #5462