Amazon's newest Fire TV Sticks are dropping support for normal sideloading, blocking apps from outside the Amazon Appstore unless the device is registered with developers. Cord Cutters News reports: This week, Amazon announced the upcoming launch of a new Fire TV Stick HD. The new model will run on Amazon's Vega OS, rather than Android, so most streaming apps will be supported, but users won't be add third party apps. Now, on the product page to preorder the new Fire Stick, some Amazon customers are getting a message warning them that the new model won't allow sideloading. Interestingly, not all customers are getting the message, whether signed in to an Amazon account or not.

The message, shown in a screenshot below, says: "For enhanced security, this device prevents sideloading or installing apps from unknown sources. Only apps from the Amazon Appstore are available for download." [...] The Fire TV Stick Select, announced in September 2025, also runs on Vega and some customers will see the same message about sideloading on that product page. [...] While Amazon continues to be a "multi-OS company," we should expect that future Fire TV models will also be built with Vega OS, limiting the apps users can access with their streaming devices to those from the Amazon Appstore.

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