No, it isn't just sideloading.

I'll happily keep my sideloading, thank you very much ...

Amazon is starting to crack down on sideloading apps. If you plan to install third-party apps on your Fire TV device, these are the models to avoid.

The new Fire TV Stick HD is the second Amazon streaming stick to launch with Vega OS. Some customers looking to buy the device are being warned that they won’t be able to sideload apps. Amazon has ...

The writing was on the wall, and now it’s on Amazon’s website. Newly released Fire Sticks will not support the sideloading of Android apps or any other software from outside Amazon’s official app ...

Amazon is blaming the threat of malware for its decision to stop releasing new Fire Sticks that support sideloading apps from outside Amazon’s Appstore. Amazon has released two Fire Stick models that ...