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Fire TV Stick 4K streaming device with Alexa Voice Remote (includes TV controls) | Dolby Vision
Sustainability features
This product has sustainability features recognized by trusted certifications.
Carbon emissions from the lifecycle of this product were reduced compared to similar products or previous models.
The Reducing CO2 label applies to products certified by the Carbon Trust, that are lowering their carbon emissions year after year for the full lifecycle of the product. The Carbon Trust was formed in 2001 and introduced the world’s first carbon label in 2007. It produces its certifications to global leading and independently verified standards. The Carbon Trust has a mission to accelerate the move to a sustainable, low carbon economy.
- Cinematic experience - Watch in vibrant 4K Ultra HD with support for Dolby Vision, HDR, and HDR10+.
- Home theater audio with Dolby Atmos - Feel scenes come to life with support for immersive Dolby Atmos audio on select titles with compatible home audio systems.
- Endless entertainment - Stream more than 1 million movies and TV episodes from Netflix, Prime Video, Disney+, Peacock, and more, plus listen to millions of songs. Subscription fees may apply.
- Live and free TV - Watch live TV, news, and sports with subscriptions to SLING TV, YouTube TV, and others. Stream for free with Pluto TV, IMDb TV, YouTube and more.
- Alexa Voice Remote lets you use your voice to search and launch shows across apps. Plus, control power and volume on your TV and soundbar with a single remote.
- Control your smart home - Ask Alexa to check weather, dim the lights, view live camera feeds, stream music and more.
- Simple and intuitive - Quickly access your favorite apps, live TV, and things you use most, all from the main menu.
- Easy to set up, compact enough to stay hidden - Plug in behind your TV, turn on the TV, and connect to the internet to get set up.
We want you to know
Dolby Atmos is available on select Prime Video, Netflix, and Disney+ titles when connected to compatible equipment.
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"Alexa, turn on the lights."
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Immersive cinematic experience
Unlock a complete 4K Ultra HD experience - With support for leading HDR formats, Dolby Atmos Audio, access to the latest 4K content, and a lightning-fast processor, Fire TV Stick 4K enables you to experience the beauty of 4K Ultra HD movies and shows on your TV.
Finding 4K Ultra HD content has never been easier on Fire TV—just press and ask, “Alexa, find 4K movies,” or browse recommendations on your home screen.
Alexa Voice RemoteYou can control your compatible TV, soundbar, and receiver with power, volume, and mute buttons. Just press and ask to easily find, launch, and control movies and TV shows. |
True-to-life picture quality
Enjoy stunning 4K Ultra HD streaming at up to 60fps. Experience the vivid, lifelike colors and exceptional clarity of Dolby Vision, HDR 10, HLG, and HDR10+. Feel scenes come to life with immersive Dolby Atmos audio on select titles, including on Prime Video, Netflix, and Disney+, when connected to compatible soundbars and home audio systems.
Find content fastStreaming on Fire TV is simple and intuitive. It all starts with the Main Menu, where you can quickly access your favorite content. Search across hundreds of channels and apps to find what you want to watch. Enjoy personalized streaming using Profiles, with recommendations, viewing history, and watch lists for each person in your household. Learn more here. |
500,000+ movies and TV episodes |
Enjoy favorites from Netflix, YouTube, Prime Video, Disney+, HBO Max, Apple TV+, STARZ, SHOWTIME, Paramount+, and others. Stream live news, sports, and must-see shows, plus thousands of titles in brilliant 4K Ultra HD, HDR, HDR10+, or Dolby Vision. Access tens of thousands of HDR titles. Plus, play millions of songs through services like Amazon Music, Apple Music, Spotify, Pandora and iHeartRadio. Subscription fees may apply. |
Watch live TV and free TVStream live TV, including news and sports, with subscriptions to Hulu+ Live TV, SLING TV, YouTube TV, and others. Plus, watch movies and TV shows for free with ad-supported apps like Pluto TV, IMDb TV, and more. |
Prime members get more from Fire TV100+ channels like HBO, SHOWTIME, STARZ, Paramount+, Cinemax, and more are available for Prime members to add—no extra apps to download, and no cable required. Only pay for the channels you want and cancel anytime. |
TV is just the beginningFire TV is always getting smarter with new Alexa skills and voice functionality. View live camera feeds, check the weather, order a pizza, and stream music. Learn more about compatible smart home devices. |
Plug and play,out of the way The compact design plugs directly into an HDMI port and can tuck neatly behind your TV. Easily move Fire TV Stick 4K between TVs at home or away so your content travels with you. |
Every day is an earth day
You don’t have to be an environmental scientist to make sustainable choices. We considered sustainability in the design of this device. Here’s how:
Low Power Mode
To reduce its energy consumption, this device will enter Low Power Mode when it goes to sleep. Learn more here.
Device Packaging
97% of this device’s packaging is made of wood fiber-based materials from responsibly managed forests or recycled sources.
Technical details
Fire TV Stick 4K technical details
Size |
99 mm x 30 mm x 14 mm (only housing) | 108 mm x 30 mm x 14 mm (including the connector) |
Weight |
53.6 g |
Processor |
Quad-core 1.7 GHz |
GPU |
IMG GE8300 |
Storage |
8 GB internal |
Wi-Fi |
Dual-band, dual-antenna Wi-Fi (MIMO) for faster streaming and fewer dropped connections than standard Wi-Fi. Supports 802.11a/b/g/n/ac Wi-Fi networks. |
Bluetooth |
Bluetooth 5.0 + LE. Pair with compatible Bluetooth speakers, headphones, video game controllers, and more. |
Voice support |
Yes, with Alexa Voice Remote (included) or the free Fire TV app (available for download on Fire OS, Android, and iOS). |
IR device control with included Alexa Voice Remote |
The included Alexa Voice Remote can control the Fire TV Stick 4K and certain functions (such as power and volume) on a wide range of compatible IR-enabled devices, including TVs, soundbars and A/V receivers. Note: Certain functions may not be available on some IR-enabled devices. |
Cloud storage |
Free cloud storage for digital content purchased from Amazon. |
Ports |
HDMI output, micro-USB for power only. |
Audio support |
Dolby Atmos, 7.1 surround sound, 2-channel stereo, and HDMI audio pass through up to 5.1. Dolby Atmos is available on select Prime Video, Netflix, and Disney+ titles when connected to compatible equipment. |
4K support |
To watch movies and TV shows in 4K Ultra HD, you need a compatible Ultra HD TV. All services may not be available in 4K/HDR. Certain services are subject to change at any time, may not be available in all areas, or in 4K/HDR, and may require separate subscriptions. Learn more about services. |
Content formats supported |
Video: Dolby Vision, HDR 10, HDR10+, HLG, H.265, H.264, VP9 Audio: AAC-LC, AC3, eAC3 (Dolby Digital Plus), FLAC, MP3, PCM/Wave, Vorbis, Dolby Atmos (EC3_JOC), Photo: JPEG, PNG, GIF, BMP |
Output resolution supported |
2160p, 1080p and 720p up to 60 fps |
System requirements |
High-definition television with available high-speed HDMI input, high-speed internet connection via Wi-Fi |
TV compatibility |
TV must support minimum HDCP requirements for protected content playback. Compatible with 1) 4K ultra high-definition TVs with HDMI capable of 2160p at 24/25/30/50/60 Hz and HDCP 2.2 or 2) high-definition TVs with HDMI capable of 1080p or 720p at 50/60 Hz. Learn more about high-definition. |
Warranty and service |
1-year limited warranty and service included. Optional 2-Year and 3-Year Extended Warranty available for U.S. customers sold separately. Use of Fire TV is subject to the terms found here. |
Regional support |
Certain services may not be available outside the U.S. |
Accessibility features |
VoiceView screen reader enables access to the vast majority of Fire TV features for users who are blind or visually impaired. Watch videos and TV shows with closed captioning displayed. Captions are not available for all content. You can also listen to Fire TV with compatible Bluetooth headphones. Learn more about accessibility for Fire TV. |
Included in the box |
Fire TV Stick 4K, Alexa Voice Remote (2nd Gen), USB cable and power adapter, HDMI extender cable for Fire TV Stick 4K, 2 AAA batteries, Quick Start Guide |
Software Security Updates |
This device receives guaranteed software security updates until at least four years after the device is last available for purchase as a new unit on our websites. Learn more about these software security updates. If you already own a Fire TV, visit Manage Your Content and Devices for information specific to your device. |
Alexa Voice Remote (2nd Gen) technical details
Size |
38 x 142 x 16 mm |
Weight |
43.4 g (without batteries) |
Batteries |
2 AAA (included) |
Technology |
Bluetooth |
Compatibility |
Fire TV Stick 4K, Fire TV Stick Lite, Fire TV Stick (3rd Gen), Fire TV Stick (2nd Gen), Fire TV Cube (2nd Gen), Fire TV Cube (1st Gen), Fire TV (3rd Gen Pendant Design) |
Software Security Updates |
This device receives guaranteed software security updates until at least four years after the device is last available for purchase as a new unit on our websites. Learn more about these software security updates. If you already own a Fire TV, visit Manage Your Content and Devices for information specific to your device. |
Sustainability features
This product has sustainability features recognized by trusted certifications.
Carbon emissions from the lifecycle of this product were reduced compared to similar products or previous models.
The Reducing CO2 label applies to products certified by the Carbon Trust, that are lowering their carbon emissions year after year for the full lifecycle of the product. The Carbon Trust was formed in 2001 and introduced the world’s first carbon label in 2007. It produces its certifications to global leading and independently verified standards. The Carbon Trust has a mission to accelerate the move to a sustainable, low carbon economy.
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers have expressed positive opinions about the performance, ease of installation, quality, and picture quality of the digital device. They mention that it works well, the remote is fantastic, and that all apps work flawlessly. They also appreciate the speed of the on-screen controls and the smoother response to the remote's commands.
AI-generated from the text of customer reviews
Customers like the performance of the digital device. They say it works well, has amazing performance, and works well with their TVs. Customers also mention that the remote is fantastic and works with their televisions. Overall, the 4K stick works well and is a very good device.
"...I no longer have any unwarranted connectivity issues, apps function fine and do not freeze or crash, and I can use them continuously for hours with..." Read more
"...feature for latency reduction on some of the older titles and it worked pretty well baring a few issues with certain games...." Read more
"...performance, which is a testament to its impressive hardware and software optimization.Alexa Voice Remote:..." Read more
"...The Voice activated remote is fantastic and works well with our TV's. NO PROGRAMMING REQUIRED...." Read more
Customers find the installation process of the digital device to be easy. They mention that the interface is snappy and the integration seems to be pretty painless. They also say that the remote is extremely easy to set up after reading the instructions and going through the on-screen. Customers also mention that it opens their smart TV to a whole world of applications. Overall, they are happy with the ease of installation and find the user interface far better than with their Sony DVD.
"...TV set up was easy. No problems connecting he remote.When it is streaming it’s fine. Looks good. But then everything freezes...." Read more
"...The interface is snappy and integration seems to be pretty painless so if you're looking for a budget media player you can use for the mean time or..." Read more
"...'s powerful quad-core processor ensures smooth navigation and quick loading times, eliminating the frustration of buffering and lag...." Read more
"...What we find fabulous about YouTube TV is that you can sign in on the website and UNCHECK all the channels you have no interest in...." Read more
Customers like the quality of the digital device. They say it's a solid product, and an excellent upgrade from the previous model. The remote feels amazing and it holds up well. The 4K stick does many things very well, and is an excellent HD TV. It's rock-solid stable and very useful.
"...and Voice control. Fire stick seems to preform very well if you hook it up correctly...." Read more
"...Amazon needs to keep up the good work. The 4K stick is a solid product and an excellent upgrade from the previous model" Read more
"...The smart controls feature is nice. I can use Alexa to change TV inputs now.-..." Read more
"...Apps crash. Apps freeze. Apps don’t even open. Home screen crashes and keeps reloading. Both Fire Stick do this. I’ve tried clear cache data...." Read more
Customers are satisfied with the picture quality of the digital device. They mention that it delivers stunning picture quality, and the sound quality is great. They are also impressed with the quality of video and audio with various HDR, making the color quality significantly better. The device has a great output of 4K Ultra HD, with up to 2016p/up to 60 fps, and provides an immersive visual treat.
"...When it is streaming it’s fine. Looks good. But then everything freezes...." Read more
"...The device did a great job with switching resolutions and frame rates for 24fps mode so if you have a TV that has these functions available, breath..." Read more
"...From its stunning 4K Ultra HD streaming to its intuitive voice control, the Fire TV Stick 4K sets a new standard in home entertainment...." Read more
"...Sound is excellent and video is vastly improved on all sets.If you don't have wifi cable modem, that is a minor technical issue...." Read more
Customers like the speed of the digital device. For example, they say it has quick performance, the on-screen controls respond quickly to the remote's commands, and it has way less buffering time. They also say it operates smoothly without lag, buffering, or freezing. That said, some complain about the remote being fast.
"...The device's powerful quad-core processor ensures smooth navigation and quick loading times, eliminating the frustration of buffering and lag...." Read more
"...from the old Fire TV but has packed in some new features such as faster processor, power, volume, and mute buttons for TV, and support for newer 4K..." Read more
"...The built in Alexa module/button is convenient and works really smoothly. The IR device control is an extra bonus that I was not even expecting...." Read more
"...No more menu lag. Things are smoother and faster overall. I've used Roku, Chromecast Ultra and Fire Stick... I like them all for different reasons...." Read more
Customers like the streaming quality of the digital device. They mention that the streaming service is awesome, the apps work great, and the 4K streaming capability, coupled with Dolby Vision, delivers stunning picture. They also say that streaming on all apps is far more efficient through this device than through their TV apps. Overall, customers are satisfied with the streaming capabilities of the product.
"...Streaming your favorite app for content, or even playing a game, it's just easy...." Read more
"...Another reason why you should get this product is because it has an Internet Browser. This allows you to search anything you’d like...." Read more
"...Don't get me wrong the streaming service is awesome and the apps work great! Loved it but in our household it's not going to work...." Read more
"...So lets get to what it really does, gives you apps like Prime video, Netflix, Hulu, and too many channels to list here...." Read more
Customers find the value of the digital device to be well worth the price. They say it's far cheaper than cable TV and just as easy to use. Customers also appreciate the option to pay for more content through the apps in Fire TV, such as Netflix. They mention that it requires no real estate and is worth purchasing.
"...is amazing because it allows you to have fun, be interactive, and lazy!..." Read more
"...Well 1st. saves you a lot of money Compared to having say, a Genie with 5 tv's hooked up. 2nd...." Read more
"...Overall it’s a very good investment for the price. It’s pretty much a roku but cheaper and it responds faster...." Read more
"...$49 is a great price ($34.95 on sale was a steal). With the exception of Peacock TV and Vudu, everything else works great...." Read more
Customers are mixed about the remote control. Some mention that it's great, simple, and easy to use. They appreciate the TV power and volume controls that are integrated right into the remote. However, others say that it sucks, doesn't have an option to change the input on their TV, and that the remote equipment control was only partially implemented. They also mention that the Roku remote doesn''t support controlling A/V receivers.
"...The Voice activated remote is fantastic and works well with our TV's. NO PROGRAMMING REQUIRED...." Read more
"...The remote itself is kinda small so I feel like it’ll get lost a time or two but they do make silicone cases and you could put like an AirTag in it..." Read more
"...3. The remote has received a fair amount of new features such as IR transmitter that can be used to control other devices as well...." Read more
"...• IR Device Control to control more with less. • Great output 4K/up to 2016p/up..." Read more
Reviews with images
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Top reviews from the United States
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My original review was a bit long winded and seems so long ago now. Probably through the power of updates, all the problems I had stated in my original review have ceased to exist. And it was quite a long time ago that the problems went away, so long that I forgot I even had so many problems with the Fire TV Sticks originally. I had continued to use them through that trouble period and long past it, I have even purchased a 3rd one. I love using them. We have one for every tv in the house. I no longer have any unwarranted connectivity issues, apps function fine and do not freeze or crash, and I can use them continuously for hours with no problems. I never bothered to replace any of my sticks that I had those problems with, so these are still the same exact ones that had all those issues. Clearly recents updates have improved the reliability and user experience and it was just a software issue, not hardware, that was causing those problems. Also since my last review of this product, they’ve updated the interface so I’ll add a new photo. I think I finally just gotten use to the new interface as well. Also gotten a new phone with a better camera since then so better quality photo for ya.
[Original review]
I really want to like these. I have 2 Fire TV Sticks 4k that we’re given to me because my grandmother bought them and didn’t want them. They were unused not even opened. I was so excited and really liked them at first. Even bought a brand new 43” Tv for my bedroom because I don’t have cable in my room so I never needed a tv before. But a month later and both Fire Stick seem to have the same problem.
Both constantly have issue with the internet, but I’ve check the internet and it is fine. Even tried to restart the router and that doesn’t even help. It’s easier to just restart the Fire Stick. Apps crash. Apps freeze. Apps don’t even open. Home screen crashes and keeps reloading. Both Fire Stick do this. I’ve tried clear cache data. Force stopping apps. I’ve restored to factor default. Deleted extra apps. I’ve not used up all the memory on the Fire Stick anyways. I mainly only use 3 apps. PLEX, Pandora, and YouTube and occasionally Prime Video. And the only fix I have is to constantly restart the thing. I shouldn’t have to restart the Fire Stick every 5 minutes and I should be able to watch an entire video without it freezing or listen to more than 3 songs with out pandora just stopping. I’m really disappointed because I really liked them at first and was going to even recommend them over the Roku. But my mother has a Roku in her room and I never hear her complain. I even know people with Fire Sticks and they’ve never complained to me so I don’t know how I could end up with two bad eggs.
I don’t really care for Alex. I don’t have an echo or anything. Voice recognition works until the Fire Stick starts have issues or the internet starts bugging out. It will just say error. If I leave it alone the internet will sometimes sort it self out. It doesn’t disconnect it just claims it’s connect with problem an further says it has no internet connection. But my internet is not out since everything else is working fine. And we don’t use a lot of devices at once in my house.
I’ve tried them on multiple TVs. They are currently connect to my ONN and old Toshiba tv. Was on a old Sharp for a while as well when I had it in the living room. I’ve since decided to have them in the office and my bedroom since it wasn’t getting as much use in the living room and that’s my mothers tv not mine. TV set up was easy. No problems connecting he remote.
When it is streaming it’s fine. Looks good. But then everything freezes. Maybe I get a good hour of solid play time a day then it will start doing it thing and I constantly need to restart the Fire Sticks again and again. It’s like it needs a break. So maybe it’s over heating. I don’t know why though because it’s not in an enclosed space and it doesn’t feel any warmer than your average electronic that running.
To be completely honest I have a gameboy and a ps2 from the early 2000s that are more reliable then these Fire Sticks.
I’m embarrassed to even use these to watch a movie with guest around. I rather use my laptop and connect it with HDMI to the tv.
Sorry. I would have taken better pictures but my phone camera is broken and vibrates like crazy. I tried to show where they are connected and that they are not confined. The White screen is pandora after it froze and I tried to force stop the app and when I launch it I often just get this white screen after the pandora logo and sometimes in the corner it will says some failed error web address thing. And there’s a picture of the internet not working. As well of some picture of it actually working. And all the photos except the first one where taken with in a 10 mins period and in that order showing that pandora was not working, youtube was not working, Internet stoped working, Internet came back (screensaver) then I got my other tv and stuff. So yea. Fun.
Reviewed in the United States on January 2, 2020
My original review was a bit long winded and seems so long ago now. Probably through the power of updates, all the problems I had stated in my original review have ceased to exist. And it was quite a long time ago that the problems went away, so long that I forgot I even had so many problems with the Fire TV Sticks originally. I had continued to use them through that trouble period and long past it, I have even purchased a 3rd one. I love using them. We have one for every tv in the house. I no longer have any unwarranted connectivity issues, apps function fine and do not freeze or crash, and I can use them continuously for hours with no problems. I never bothered to replace any of my sticks that I had those problems with, so these are still the same exact ones that had all those issues. Clearly recents updates have improved the reliability and user experience and it was just a software issue, not hardware, that was causing those problems. Also since my last review of this product, they’ve updated the interface so I’ll add a new photo. I think I finally just gotten use to the new interface as well. Also gotten a new phone with a better camera since then so better quality photo for ya.
[Original review]
I really want to like these. I have 2 Fire TV Sticks 4k that we’re given to me because my grandmother bought them and didn’t want them. They were unused not even opened. I was so excited and really liked them at first. Even bought a brand new 43” Tv for my bedroom because I don’t have cable in my room so I never needed a tv before. But a month later and both Fire Stick seem to have the same problem.
Both constantly have issue with the internet, but I’ve check the internet and it is fine. Even tried to restart the router and that doesn’t even help. It’s easier to just restart the Fire Stick. Apps crash. Apps freeze. Apps don’t even open. Home screen crashes and keeps reloading. Both Fire Stick do this. I’ve tried clear cache data. Force stopping apps. I’ve restored to factor default. Deleted extra apps. I’ve not used up all the memory on the Fire Stick anyways. I mainly only use 3 apps. PLEX, Pandora, and YouTube and occasionally Prime Video. And the only fix I have is to constantly restart the thing. I shouldn’t have to restart the Fire Stick every 5 minutes and I should be able to watch an entire video without it freezing or listen to more than 3 songs with out pandora just stopping. I’m really disappointed because I really liked them at first and was going to even recommend them over the Roku. But my mother has a Roku in her room and I never hear her complain. I even know people with Fire Sticks and they’ve never complained to me so I don’t know how I could end up with two bad eggs.
I don’t really care for Alex. I don’t have an echo or anything. Voice recognition works until the Fire Stick starts have issues or the internet starts bugging out. It will just say error. If I leave it alone the internet will sometimes sort it self out. It doesn’t disconnect it just claims it’s connect with problem an further says it has no internet connection. But my internet is not out since everything else is working fine. And we don’t use a lot of devices at once in my house.
I’ve tried them on multiple TVs. They are currently connect to my ONN and old Toshiba tv. Was on a old Sharp for a while as well when I had it in the living room. I’ve since decided to have them in the office and my bedroom since it wasn’t getting as much use in the living room and that’s my mothers tv not mine. TV set up was easy. No problems connecting he remote.
When it is streaming it’s fine. Looks good. But then everything freezes. Maybe I get a good hour of solid play time a day then it will start doing it thing and I constantly need to restart the Fire Sticks again and again. It’s like it needs a break. So maybe it’s over heating. I don’t know why though because it’s not in an enclosed space and it doesn’t feel any warmer than your average electronic that running.
To be completely honest I have a gameboy and a ps2 from the early 2000s that are more reliable then these Fire Sticks.
I’m embarrassed to even use these to watch a movie with guest around. I rather use my laptop and connect it with HDMI to the tv.
Sorry. I would have taken better pictures but my phone camera is broken and vibrates like crazy. I tried to show where they are connected and that they are not confined. The White screen is pandora after it froze and I tried to force stop the app and when I launch it I often just get this white screen after the pandora logo and sometimes in the corner it will says some failed error web address thing. And there’s a picture of the internet not working. As well of some picture of it actually working. And all the photos except the first one where taken with in a 10 mins period and in that order showing that pandora was not working, youtube was not working, Internet stoped working, Internet came back (screensaver) then I got my other tv and stuff. So yea. Fun.
I've pretty much tested it into the ground at this point but I'm still no where near complete as I don't have some of the necessary features like Dolby Atmos and an HDR tv to really see what it can do. Even with that being said, I can attest that it does hit the 4k resolution as promised.
I unfortunately could not connect this directly to my receiver(a pioneer vsx 520) as it would not pick up the 4k resolution. I opted to use the ARC function available, and that at least gave me some functionality though it doesn't quite seem to work well with anything other than the regular dolby digital 5.1 format.
A few times I found it dropping the ARC connection from the TV but I honestly don't know how much of a role the stick is playing in this occurrence. I was pretty surprised how well the Wifi handles on this device. At close distances it was able to use all of my 300mbit connection down but for some reason it split the upload speed in half.
Going much further out, about 40 ft, I definitely saw a huge drop in the connection showing about 40mbit down and up which was still good enough for streaming much of my media. I own an HDHomeRun Connect OTA which ran fine after an update.
I'm a big KODI user, and though Amazon doesn't support the application, I found it pretty easy to get around this and install it using the Downloader app. This allowed me to test most of my personal media. Initially, I was having issues playing my DVD iso's but after updating KODI to 18.1 RC1, things started to work. I did, however, have to take off the hardware codec as the movies were choppy for some reason. Apparently, this has been an ongoing issue.
If your not into DVD menu's like myself, you can just use the MKV format with the mpeg-2 codec and things will run fine. I also tried a few Blu-Rays as well. The H.264 codec with the MP4 format worked without a problem but using the MKV format with the VC1 had stuttering issues.
If you have a good media server, than I just recommend transcoding with Plex or Emby as converting can take forever. The device did a great job with switching resolutions and frame rates for 24fps mode so if you have a TV that has these functions available, breath easy.
Lastly I tested out some games. The FireStick unfortunately only supports three controllers at this time the Xbox One, PlayStation 4(ver 2), and the Matricom(I specifically used G-PAD BX). I grabbed RetroArch, a great multi emulation application.
It would seem the PlayStation is far as you are going to get for good performance on 3D accelerated games. I tried out the Run-Ahead feature for latency reduction on some of the older titles and it worked pretty well baring a few issues with certain games. I do believe that some N64 and PSP games can work with the FireStick but it is recommend you use the separate emulators rather than RetroArch to run them.
I'm no where near done with trying things out but as you can see, the FireStick 4K does hold up pretty well for the price. The interface is snappy and integration seems to be pretty painless so if you're looking for a budget media player you can use for the mean time or for a secondary room this is definitely the one I recommend.