I knew that before but there’s something you can do about it. At least I hope it helps.

In about:config find and set the following options:
extensions.pocket.enabled = false
toolkit.coverage.endpoint.base = "" (empty string)
toolkit.coverage.opt-out = true
toolkit.telemetry.coverage.opt-out = true
browser.region.update.enabled = false
browser.region.network.url = "" (empty string)

Block the following domains in Pi-hole, AGH, NextDNS or of you don’t use any of that then in you hosts file:
spocs.getpocket.com
location.services.mozilla.com
contile.services.mozilla.com
getpocket.cdn.mozilla.net