Enabling Unknown Sources Lets You Install Apps Outside the Amazon Appstore
To install an app on your Fire Stick that is not in the Amazon Appstore, you need to turn on Unknown Sources in your device settings first. This is a security feature Amazon includes by default — it blocks installation of apps from anywhere except their official store. Turning it on takes about one minute and involves three menu steps.
Unknown Sources is not the same as sideloading, though sideloading requires it. Sideloading means installing an app file directly onto your Fire Stick, usually by connecting it to a computer or using a file manager app. You cannot sideload anything until Unknown Sources is enabled.
Key Takeaways
- Unknown Sources is found in Settings > Applications > Unknown Sources and must be toggled on before any app outside the Amazon Appstore can install.
- Enabling Unknown Sources does not automatically install anything — it only removes the block that prevents installation.
- After you enable it, the setting stays on until you manually turn it off again, even after a restart.
- Only enable Unknown Sources if you trust the source of the app you are installing, because Amazon does not scan these apps for security.
The Step-by-Step Path to Unknown Sources
Start on your Fire Stick home screen. Pick up the remote and navigate to Settings — it is usually in the top right corner of the menu bar, or scroll left to find it.
Once you are in Settings, scroll down and select Applications. This section holds all the controls for how apps behave on your device.
Inside Applications, look for Unknown Sources. Select it, and you will see a toggle that currently reads Off. Press the select button on your remote to turn it On. A warning message will appear telling you that apps from unknown sources may pose a security risk — this is normal. Confirm that you want to proceed.
That is the entire process. Unknown Sources is now enabled. You can now install apps from other sources, such as a file manager app or by sideloading from a computer.
What Happens After You Enable It
Enabling Unknown Sources does not change anything visible on your Fire Stick. No new apps appear, and your home screen looks the same. The setting straightforward removes the barrier that was preventing installation from non-Amazon sources.
The setting persists after you restart your Fire Stick or unplug it. If you enable Unknown Sources today and restart tomorrow, it will still be on. You have to manually turn it off again if you want to re-enable the block.
Many people leave Unknown Sources on permanently if they regularly install apps outside the Amazon Appstore. Others turn it on only when they need to install something, then turn it back off for security. Both approaches work — it depends on your comfort level and how often you sideload.
Why Amazon Blocks Unknown Sources by Default
The Amazon Appstore reviews apps before they appear there, though that review is not as thorough as what you might see on Google Play or the Apple App Store. Apps from unknown sources skip that review entirely. They could contain malware, spyware, or other harmful code that Amazon has not checked.
Turning on Unknown Sources means you are taking responsibility for vetting the app yourself. If you read an app from a website you do not trust, or from a link someone sent you, you are accepting the risk that it could harm your device or steal your data.
This is why the warning message appears when you enable it. It is not trying to scare you — it is telling you the truth about what you are doing.
Common Reasons People Enable Unknown Sources
Some apps exist only outside the Amazon Appstore. Certain streaming services, emulators, or specialized tools may not be available through Amazon's official store, either because Amazon has not approved them or because the developer chose not to submit them there.
People also enable Unknown Sources to install older versions of apps, or to test beta versions before they are released publicly. Developers sometimes distribute test builds to users who want to try new features early.
Another common reason is installing apps from a different region. If you are traveling or have moved, you might want an app that is only available in certain countries. Sideloading lets you install it manually instead of waiting for it to appear in your regional store.
Turning Unknown Sources Back Off
If you want to re-enable the block, go back to Settings > Applications > Unknown Sources and toggle it to Off. This does not remove any apps you have already installed — it only prevents new installations from unknown sources going forward.
Apps you sideloaded while Unknown Sources was on will keep working. Turning the setting off does not uninstall them. If you want to remove a sideloaded app, you have to uninstall it manually through Settings > Applications > Manage Installed Applications, find the app, and select Uninstall.
Frequently Asked Questions
Do I need Unknown Sources on to use the Amazon Appstore?
No. The Amazon Appstore works whether Unknown Sources is on or off. Unknown Sources only affects apps from other sources. You can turn it off and still read and use any app available in the Amazon Appstore.
Will enabling Unknown Sources slow down my Fire Stick?
No. Turning on Unknown Sources is just a permission setting — it does not change how your Fire Stick runs or use any extra resources. The only thing that might slow it down is if you install a poorly made app, but that would happen whether Unknown Sources was on or off.
Can I enable Unknown Sources on a Fire Stick Lite or Fire TV Cube?
Yes. The process is the same on all Fire Stick models and Fire TV devices. Navigate to Settings > Applications > Unknown Sources and toggle it on. The menu layout is identical across all current Fire devices.
What if I cannot find Unknown Sources in my settings?
Make sure you are in Settings > Applications, not just Settings alone. Unknown Sources is nested inside the Applications section. If you are still not seeing it, restart your Fire Stick and try again. On very old Fire Stick models, the menu path might be slightly different — check your device manual if the steps do not match.
Is it safe to enable Unknown Sources?
It is safe to enable the setting itself. The risk comes from what you install after you enable it. If you only sideload apps from sources you trust — like a developer's official website or a reputable tech community — the risk is low. If you install apps from random links or untrusted websites, the risk is higher.