Home Tech Land is reader-supported. When you buy through links on our site, we may earn a commission. As an Amazon Associate, we earn from qualifying purchases.
Last updated: . How we research: We build these guides from manufacturer support documentation and owner reports, and we update them when menus or apps change. Learn more about Home Tech Land.
If you can’t sideload apps on your new Fire TV Stick, Vega OS is the reason: Amazon’s newest sticks run a Linux-based system that only installs apps from the Amazon Appstore. The Fire TV Stick 4K Select, the 2026 Fire TV Stick HD, and the third-generation Fire TV Stick 4K all run Vega OS, so Downloader, Kodi installers, and other Android app files simply won’t work. Older and pricier models such as the Fire TV Stick 4K Max and Fire TV Cube still run Android-based Fire OS and can sideload.
Quick answer: No setting or workaround turns on sideloading on a Vega OS stick. If you need apps from outside the Amazon Appstore, return the stick and buy a Fire OS model such as the Fire TV Stick 4K Max. Check the Fire TV Stick 4K Max price on Amazon.
Key takeaways
- What changed: Amazon replaced Android-based Fire OS with its own Linux-based Vega OS on its newest sticks, starting with the Fire TV Stick 4K Select in October 2025.
- Vega OS sticks: The Fire TV Stick 4K Select, the Fire TV Stick HD (2026), and the Fire TV Stick 4K (3rd Gen, 2026) can’t sideload apps.
- Fire OS devices: The Fire TV Stick 4K Max, Fire TV Cube (3rd Gen), and Fire TV smart TVs still allow sideloading after you turn on Developer Options.
- What to do: Return a Vega stick within the return window if you need sideloading, or stick to Amazon Appstore apps.
What is Vega OS, and why does it block sideloading?
Vega OS is Amazon’s own operating system for Fire TV, built on Linux instead of Android. It first shipped on the Fire TV Stick 4K Select in October 2025, according to PCWorld. Because it has no Android runtime, it can’t run Android package (APK) files, the format that sideloaded apps use. Amazon’s store page for the 2026 Fire TV Stick HD may warn that “for enhanced security, this device prevents sideloading or installing apps from unknown sources” and that only Amazon Appstore apps are available, according to Android Authority.
Amazon says Vega makes its sticks faster, and PCWorld reports that the new HD stick runs more than 30% faster on average than the previous model, according to Amazon. The tradeoff is control: the Developer Options menu that lets Fire OS devices install unknown apps doesn’t give Vega sticks a way to install Android apps.
Which Fire TV devices can sideload apps?
| Device | Operating system | Sideloading | Notes |
|---|---|---|---|
| Fire TV Stick 4K Select (2025) | Vega OS | No | List price rose to $49.99 in August 2026 |
| Fire TV Stick HD (2026) | Vega OS | No | 1080p; launched at $34.99 in April 2026 |
| Fire TV Stick 4K (3rd Gen, 2026) | Vega OS | No | Launched September 30, 2026, at $59.99 |
| Fire TV Stick HD (earlier model) | Fire OS | Yes | Older stock only |
| Fire TV Stick 4K Plus | Fire OS | Yes | Remaining stock only |
| Fire TV Stick 4K Max (2nd Gen) | Fire OS | Yes | List price $84.99 |
| Fire TV Cube (3rd Gen) | Fire OS | Yes | List price $199.99 |
| Smart TVs with Fire TV built in | Fire OS | Yes | Insignia, TCL, Hisense, and others |
Sources: PCWorld, BGR, and AFTVnews; 2026 price changes come from AFTVnews. Amazon doesn’t always label the operating system on its listings, so check before you buy.
How to check which Fire TV you have
- On your Fire TV home screen, open Settings (the gear icon).
- Select My Fire TV, then About.
- Read the device name at the top of the list, then match it to the table above.
- Still unsure? Select the device name seven times. On a Fire OS device, a message confirms that Developer Options is on, and the menu appears under My Fire TV with an Install unknown apps option. If no such option appears, you likely have a Vega OS device.
You can also check the box or your order history: the 2026 Fire TV Stick HD has a slimmer design and Wi-Fi 6, while the older HD model uses Wi-Fi 5, according to PCWorld and BGR.
Your options if you have a Vega OS stick
1. Return or exchange it
If you bought the stick for sideloading, return it while you still can. Amazon’s standard return window for most items is 30 days, so check the exact date in your orders page.
2. Use the Amazon Appstore versions
Major streaming apps such as Netflix, YouTube, and Prime Video are available for Vega OS in the Amazon Appstore. Our guide to activating YouTube on Fire TV walks through signing in. Some niche apps haven’t reached Vega yet, so search the Appstore for the app you need before you give up.
3. Switch to a Fire OS or Google TV device
The Fire TV Stick 4K Max is the cheapest new Amazon stick that still sideloads; read our Fire TV Stick 4K Max review. The Fire TV Cube adds hands-free Alexa and Ethernet, as our Fire TV Cube 3rd Gen review explains. Google TV devices also install Android apps from outside the Play Store.
How to sideload apps on a Fire OS device
- Search the Amazon Appstore for Downloader by AFTVnews and install it.
- Open Settings, then My Fire TV, then About, and select your device name seven times to turn on Developer Options.
- Go back to My Fire TV, open Developer Options, select Install unknown apps, and turn it on for Downloader.
- Open Downloader, enter the web address of the app file from the developer’s official site, and follow the install prompts.
Only install apps from developers you trust. Fire OS now blocks apps that Amazon identifies as providing access to unlicensed content, both at launch and at install, according to 9to5Google, and Amazon says it won’t make exceptions. Our G96 TV stick review explains the security risks of unofficial streaming software.
Troubleshooting sideloading on Fire OS
- The Install unknown apps list is empty: A Fire TV Settings bug caused this on some older devices in 2026, according to TechRadar. Amazon said a fix would arrive in a Fire TV Settings update, so go to Settings, My Fire TV, About, and select Check for updates.
- You can’t find Downloader: Amazon briefly pulled Downloader from the Appstore in March 2026 before it returned, according to Cord Busters, and paid lookalike apps appeared in search. Type the name manually and confirm the developer is AFTVnews.
- Developer Options disappeared: Some updates hide the menu again. Repeat the seven-select step under About.
- An app says it’s blocked: Amazon blocks apps it flags for unlicensed content, and it doesn’t offer workarounds. Uninstall it and use a licensed alternative.
Compare similar streaming devices on Amazon
Amazon is our main affiliate partner, and it carries every streaming device below, including models that still let you sideload apps.
| Streaming device | Operating system | Sideloading | Best for | Shop |
|---|---|---|---|---|
| Fire TV Stick 4K Max (2nd Gen) | Fire OS | Yes | The cheapest new Fire TV that sideloads | Check price |
| Fire TV Cube (3rd Gen) | Fire OS | Yes | Hands-free Alexa and Ethernet | Check price |
| Google TV Streamer | Google TV | Yes | Android apps and smart home control | Check price |
| Roku Streaming Stick Plus | Roku OS | No | A simple, low-cost 4K stick | Check price |
| Fire TV Stick 4K Select | Vega OS | No | Mainstream apps on a budget | Check price |
Not sure which apps you need? Our best streaming service guide compares the major services, all of which work on every device above.
Frequently asked questions
Can you sideload apps on the Fire TV Stick 4K Select?
No, you can’t sideload apps on the Fire TV Stick 4K Select, because it runs Vega OS, which can’t install Android app files. You can only install apps from the Amazon Appstore.
Which Fire TV Sticks still support sideloading?
The Fire TV Stick 4K Max, the Fire TV Stick 4K Plus, the original Fire TV Stick HD, the Fire TV Cube (3rd Gen), and smart TVs with Fire TV built in still support sideloading, because they run Android-based Fire OS. The 4K Max and the Cube are the Fire OS models Amazon still sells new.
Will Amazon add sideloading to Vega OS later?
Amazon hasn’t announced any plan to add sideloading to Vega OS. Its store pages say the Vega sticks prevent sideloading for enhanced security, and because Vega OS has no Android runtime, Android apps couldn’t run on it even if Amazon allowed outside installs.
Why did Downloader stop working on my older Fire TV Stick?
Downloader stopped working on many older Fire TV Sticks in late summer 2026 because of a Fire TV Settings bug, not a policy change. Amazon told AFTVnews that a fix would roll out in a Fire TV Settings update, so check for updates under Settings, My Fire TV, About.
The bottom line
Vega OS blocks sideloading on the Fire TV Stick 4K Select, the 2026 Fire TV Stick HD, and the third-generation Fire TV Stick 4K, and no setting changes that. If you only use mainstream streaming apps, a Vega stick works fine. If you rely on Downloader or other Android apps from outside the Appstore, choose a Fire OS device such as the Fire TV Stick 4K Max or the Fire TV Cube instead. Check the current Fire TV Stick 4K Max price on Amazon.