Disable Pocket (two config toggles plus direct UI interaction with the Omnibar's Pocket icon)
extensions.pocket.enabled = false
extensions.pocket.onSaveRecs = false
It sort of annoys me that 'pocket' can't just be disabled from the UI bar to hide it everywhere, but that's not nearly as annoying as the last link you provided...
The Telemetry stuff is insanely invasive and really needs to all have one _system_ level toggle for it rather than the like _twenty_ different flags and settings (even with the 5 dupes from the article's dump cleaned up)...
about:preferences#privacy
Uncheck all
.
devtools.onboarding.telemetry.logged = false
toolkit.telemetry.updatePing.enabled = false
browser.newtabpage.activity-stream.feeds.telemetry = false
browser.newtabpage.activity-stream.telemetry = false
browser.ping-centre.telemetry = false
toolkit.telemetry.bhrPing.enabled = false
toolkit.telemetry.enabled = false
toolkit.telemetry.firstShutdownPing.enabled = false
toolkit.telemetry.hybridContent.enabled = false
toolkit.telemetry.newProfilePing.enabled = false
toolkit.telemetry.reportingpolicy.firstRun = false
toolkit.telemetry.shutdownPingSender.enabled = false
toolkit.telemetry.unified = false
toolkit.telemetry.updatePing.enabled = false
toolkit.telemetry.archive.enabled = false
devtools.onboarding.telemetry.logged = false
toolkit.telemetry.bhrPing.enabled = false
datareporting.healthreport.uploadEnabled = false
datareporting.policy.dataSubmissionEnabled = false
datareporting.sessions.current.clean = true
.
toolkit.telemetry.server = "" (empty string)