The lesson: every "debloat your Firestick with ADB" guide sets the values, watches settings get echo them back, and calls it done.
Nobody reboots and re-reads.
Half of it is placebo.
My Fire TV Stick got slow, so I connected to it over ADB and spent an evening actually measuring what was wrong.
Most of what I found contradicts the standard advice. Thread.
Where it landed: Private DNS (DoT) to https://t.co/mv5TqeC6Bw.
11 of 16 Amazon telemetry domains blocked. No account, no logging.
And unlike the settings — I rebooted and checked. It holds.