This type of telemetry can go die in a fire for all I'm concerned, but these trackers are particularly devious with their constantly changing domains and URLs. Addons that allow for things like regex matching are the only solution that seems to work because the Pihole blacklist doesn't seem to block them sufficiently.

Mozilla has already killed off malicious addons by enforcing their signature requirements. I'm not sure what this adds, I doubt Mozilla will hire someone to monitor the changes to banking URLs around the world (a necessity if this is indeed intended to make banking safer).