This guide is outdated. Please follow the new guide here.
The Amazon Fire TV checks for updates during its initial setup. If an update is found, it downloads and installs the update without prompting for approval. All future updates are installed automatically without approval as well. The only way to block an update on a new or unrooted Fire TV is to block the update server through your router’s filtering or DNS options. This guide will show you how to block Fire TV updates using your router settings.
There are three domains to block:
The first domain is where the updates are downloaded from, while the other two domains are accessed by the Fire TV to check if an update is available.
Different router models will handle domain blocking differently, so I can’t give you exact instructions. If you don’t know how to do it for your particular router, refer to your router’s user guide for exact instructions. The router setting you want to look for will likely be labeled as one of the following: Firewall, Filtering, Blocking, or Parenting.
Here is what the setting looks like in my Netgear router.
If your router does not have blocking capabilities, or you do not have access to the settings, you can alternately block the domains by setting up your router to use a services like OpenDNS and blocking the domain within their DNS options. OpenDNS has detailed guides to help you set it up.
Additional sample router configuration screens: