Amazon Fire Hd 8 10th Generation Custom Rom Top [exclusive] May 2026
Amazon Fire HD 8 (10th Generation) there are currently no functional custom ROMs available
because a method to unlock its bootloader has not been discovered . Unlike older models (like the 8th Gen) that could run , the 10th Gen remains locked to Amazon's ecosystem.
Instead of a full ROM, the top "fix" for this device is using the Fire Toolbox on a PC to bypass most of Amazon's restrictions. Top Modifications via Fire Toolbox
Since you cannot flash a new OS, the following modifications provide the closest "stock Android" experience: Google Play Store
: Installs all required Google services so you can use standard apps like YouTube and Gmail. Custom Launcher : Replaces the Amazon home screen with options like Nova Launcher or Microsoft Launcher. Bloatware Removal
: Disables built-in Amazon apps and tracking services to free up system resources. Lock Screen Ad Removal
: Removes the sponsored "Special Offers" from the lock screen without paying the extra fee. Review: Performance & Usability
The 10th Gen Fire HD 8 (released in 2020) features a 2.0 GHz quad-core processor and 2 GB of RAM.
As of April 2026, there is no known method to unlock the bootloader or install a custom ROM on the Amazon Fire HD 8 (10th Generation, 2020)
. Unlike older models, Amazon implemented hardware and firmware changes in this generation that blocked the previously popular "shorting" exploits used to gain low-level access.
Because a custom ROM requires an unlocked bootloader, you cannot currently install LineageOS or similar operating systems on this specific device. Current "Best" Alternatives
While a full custom ROM is not possible, you can achieve a "near-stock" Android experience using the following tools:
Fire Toolbox: This is the most comprehensive Windows-based utility for this device. It allows you to:
Install Google Play Services: Adds the Google Play Store for standard Android apps.
Custom Launcher: Replaces the Amazon home screen with options like Nova Launcher or Microsoft Launcher.
Remove Ads: Disables lock screen advertisements without paying Amazon.
Debloat: Disables or hides pre-installed Amazon apps that slow down the device.
Sideloading Google Play: If you don't want to use a PC, you can manually download and install four specific APK files (Google Account Manager, Google Services Framework, Google Play Services, and Google Play Store) to enable standard Android apps. Summary of Device Status (April 2026) Feature Bootloader Unlock Impossible No current software or hardware exploit. Root Access No No permanent root available for 10th Gen models. Custom ROMs None Requires unlocked bootloader. Google Play Yes Possible via Fire Toolbox or manual sideloading. Custom Launcher Yes Possible via Fire Toolbox's "Launcher Manager".
For the latest updates on potential exploits, it is recommended to monitor the Amazon Fire HD 8 and HD 10 General Forum on XDA. Fire HD 8 and HD 10 General - XDA Forums
As of April 2026, there is no known method to unlock the bootloader for the Amazon Fire HD 8 (10th Generation, 2020). Without an unlocked bootloader, you cannot install a full custom ROM like LineageOS.
However, you can still achieve a "custom ROM experience" by using the Fire Toolbox to modify the existing Fire OS. 1. Alternative: "Customizing" via Fire Toolbox
Instead of a full ROM, the Fire Toolbox (available on XDA Forums) allows you to transform the tablet into a near-stock Android device:
Google Services: Install the Google Play Store and related services.
Custom Launcher: Replace the Amazon home screen with Nova Launcher or Microsoft Launcher.
Debloat: Disable pre-installed Amazon apps and lock screen ads.
OTA Management: Block automatic Amazon updates that might remove these modifications. 2. Custom ROMs for Older Generations
If you possess an 8th Generation (2018) or older model, full custom ROMs are available on XDA Developers:
How to Install Android on Your Amazon Fire Tablet - Peicheng
Currently, no functional custom ROMs for the Amazon Fire HD 8 (10th Generation, 2020) because its bootloader cannot be unlocked.
While older models (like the 7th or 8th generation) can run LineageOS, the 10th generation "Onyx" model lacks the necessary exploits to install custom firmware or a custom recovery like TWRP. Best Alternative: Fire Toolbox
Since you cannot flash a new ROM, the standard way to "clean" this device is by using the Fire Toolbox amazon fire hd 8 10th generation custom rom top
. This Windows-based utility allows you to modify the existing Fire OS to make it function like stock Android: Google Play Store
: Install Google Services and the Play Store to access millions of standard Android apps. Custom Launcher
: Replace the Amazon home screen with a cleaner alternative like Nova Launcher Microsoft Launcher
: Disable or hide pre-installed Amazon "bloatware" that slows down the device. Lockscreen Ads
: Remove "Special Offers" ads from your lockscreen without paying Amazon. OTA Updates
: Block automatic Amazon updates that might remove these modifications in the future. Why are there no ROMs? Locked Bootloader
: Amazon's 10th generation security is significantly tighter than previous years. Without an exploit to bypass this, the device will only boot firmware signed by Amazon. Hardware Barriers
: Unlike the 2018 model, which could be unlocked by physically shorting pins on the motherboard, no similar hardware "test point" exploit has been found for the 2020 model. Hacker News
As of late 2024, there is no known way to unlock the bootloader for the Amazon Fire HD 8 10th Generation (2020 model, codenamed "onyx"), which is a prerequisite for installing a custom ROM like LineageOS.
While older models (7th and 8th Gen) had hardware or software exploits to bypass these restrictions, the 10th Generation remains locked. However, you can still significantly modify the tablet using tools that do not require an unlocked bootloader. Top Alternatives to a Custom ROM
Since a full ROM flash isn't currently possible, most users "de-Amazon" their tablets using these methods:
Amazon Fire Toolbox: This is the gold standard for modifying Fire tablets without a custom ROM. It allows you to:
Install Google Play Store: Get access to the full library of Android apps instead of just the Amazon Appstore.
Remove Bloatware: Disable pre-installed Amazon apps and advertisements (lock screen ads).
Custom Launcher: Replace the Amazon home screen with a stock-looking Android launcher like Nova Launcher.
Custom Keyboards/Assistants: Swap out the default keyboard or replace Alexa with Google Assistant. Why You Can't Flash a ROM on 10th Gen
Locked Bootloader: Amazon has patched the exploits used in earlier generations (like the "shorting pins" method).
No Active Exploits: Development on XDA Forums for this specific generation primarily focuses on the Toolbox rather than full ROMs due to these security barriers. Summary of ROM Compatibility (Fire HD 8) Generation Release Year Custom ROM Support 7th & 8th Gen Yes (LineageOS 14.1, 16.0, 17.1) 10th Gen 2020 No (Locked bootloader) No (Locked bootloader)
If you are looking to buy a tablet specifically for custom ROMs, the 8th Gen (2018) is the last Fire HD 8 model that widely supports them.
Unlocking the Full Potential of the Amazon Fire HD 8 (10th Generation): A Guide to Custom ROMs
The Amazon Fire HD 8 (10th Generation) is a budget-friendly tablet that offers a great balance of performance and affordability. However, its out-of-the-box experience is limited by Amazon's Fire OS, which can feel restrictive and lacking in features compared to other Android tablets. Fortunately, the Fire HD 8 has a thriving community of developers and enthusiasts who have created custom ROMs to unlock its full potential. In this blog post, we'll explore the top custom ROMs available for the Fire HD 8 (10th Generation) and provide a step-by-step guide on how to install them.
Why Install a Custom ROM on Your Fire HD 8?
Before we dive into the best custom ROMs for the Fire HD 8, let's discuss the benefits of installing one:
- More features: Custom ROMs often offer features not found in the stock Fire OS, such as Google Play Store support, custom launchers, and advanced settings.
- Better performance: By removing Amazon's bloatware and optimizing the operating system, custom ROMs can breathe new life into your tablet, making it faster and more responsive.
- Latest software updates: Custom ROMs can provide access to the latest Android versions and security patches, ensuring your device stays up-to-date and secure.
Top Custom ROMs for the Fire HD 8 (10th Generation)
Here are some of the most popular custom ROMs available for the Fire HD 8 (10th Generation):
- LineageOS: A popular, open-source ROM that offers a clean, AOSP-based experience with regular updates and a wide range of customization options.
- TWRP (Team Win Recovery Project): A custom recovery ROM that allows you to install other ROMs, kernels, and mods, as well as backup and restore your device.
- Fire OS Open Source Project (FOSP): A community-driven ROM that aims to bring a more open-source and feature-rich experience to the Fire HD 8, with support for Google Play Services and more.
- Evolution X: A custom ROM that offers a unique blend of features from various Android distributions, including AOSP, Xiaomi's MIUI, and more.
Installing a Custom ROM on Your Fire HD 8: A Step-by-Step Guide
Warning: Installing a custom ROM on your Fire HD 8 will void its warranty and may potentially brick your device. Proceed with caution and at your own risk.
To install a custom ROM on your Fire HD 8 (10th Generation), follow these steps:
- Unlock your bootloader: Use tools like ADB and Fastboot to unlock your device's bootloader. This will allow you to install custom ROMs.
- Install TWRP: Use TWRP to install other ROMs, kernels, and mods. You can find TWRP images for the Fire HD 8 on the official TWRP website.
- Backup your data: Before installing a custom ROM, make sure to backup your important data, such as apps, contacts, and files.
- Download a custom ROM: Choose a custom ROM from the list above and download the corresponding image file.
- Install the custom ROM: Use TWRP to install the custom ROM image file. Follow the on-screen instructions to complete the installation process.
Conclusion
The Amazon Fire HD 8 (10th Generation) is a great device that can be transformed into a powerful and feature-rich tablet with the right custom ROM. By installing a custom ROM, you can unlock new features, improve performance, and stay up-to-date with the latest software updates. However, be sure to follow the installation process carefully and at your own risk. With the right guidance and precautions, you can breathe new life into your Fire HD 8 and take it to the next level. Amazon Fire HD 8 (10th Generation) there are
Additional Resources
- XDA Developers: Fire HD 8 (10th Generation) Forum
- TWRP Official Website
- LineageOS Official Website
Disclaimer
The author and this blog post are not responsible for any damage or issues that may arise from installing custom ROMs on your Fire HD 8 (10th Generation). Proceed with caution and at your own risk.
Unlocking the Full Potential of the Amazon Fire HD 8 (10th Generation) with Custom ROMs
The Amazon Fire HD 8 (10th Generation) is a versatile and affordable tablet that offers a wide range of features, including a stunning 8-inch HD display, quad-core processor, and up to 32GB of internal storage. While it's a great device on its own, many users want more – more control, more customization options, and more access to the Android ecosystem. That's where custom ROMs come in.
In this article, we'll explore the world of custom ROMs for the Amazon Fire HD 8 (10th Generation) and show you how to unlock the full potential of your device.
What is a Custom ROM?
A custom ROM is a modified version of the Android operating system that's designed to replace the device's original firmware. Custom ROMs offer a wide range of benefits, including:
- Customization options: Custom ROMs often provide more customization options than the original firmware, allowing you to personalize your device to suit your needs.
- New features: Custom ROMs can add new features to your device, such as improved performance, new UI elements, and enhanced functionality.
- Better performance: Custom ROMs can be optimized for better performance, providing a smoother and more responsive user experience.
- Latest Android versions: Custom ROMs can provide access to the latest Android versions, even if your device is no longer supported by the manufacturer.
Why Do You Want a Custom ROM on Your Amazon Fire HD 8?
The Amazon Fire HD 8 (10th Generation) runs on a customized version of Android, which is limited in terms of features and customization options. By installing a custom ROM, you can:
- Get access to the Google Play Store: The Fire HD 8 comes with Amazon's Appstore, which has a limited selection of apps. With a custom ROM, you can install the Google Play Store and access a vast library of Android apps.
- Improve performance: The Fire HD 8's performance can be improved with a custom ROM, which can provide a smoother and more responsive user experience.
- Customize your device: Custom ROMs offer a wide range of customization options, allowing you to personalize your device to suit your needs.
Top Custom ROMs for Amazon Fire HD 8 (10th Generation)
Here are some of the top custom ROMs for the Amazon Fire HD 8 (10th Generation):
- LineageOS: LineageOS is one of the most popular custom ROMs available, and it's a great option for the Fire HD 8. It offers a clean and intuitive interface, along with a wide range of customization options.
- TWRP: TWRP (Team Win Recovery Project) is a popular custom recovery that can be used to install custom ROMs on the Fire HD 8. It's a great option for advanced users who want more control over their device.
- FireOS: FireOS is a custom ROM that's specifically designed for the Fire HD 8. It offers a range of features, including access to the Google Play Store and improved performance.
How to Install a Custom ROM on Amazon Fire HD 8 (10th Generation)
Installing a custom ROM on the Amazon Fire HD 8 (10th Generation) requires some technical expertise, but it's doable with the right guidance. Here's a step-by-step guide:
Step 1: Unlock the Bootloader
The first step is to unlock the bootloader on your Fire HD 8. This will allow you to install custom firmware on your device.
- Download the bootloader unlock tool: Download the bootloader unlock tool from the Amazon Fire HD 8 forums.
- Enable Developer Options: Go to Settings > About > Build number and tap on it 7 times to enable Developer Options.
- Enable OEM Unlocking: Go to Settings > Developer Options > OEM Unlocking and toggle it on.
- Unlock the bootloader: Follow the instructions provided with the bootloader unlock tool to unlock the bootloader on your Fire HD 8.
Step 2: Install TWRP
Once the bootloader is unlocked, you can install TWRP (Team Win Recovery Project) on your Fire HD 8.
- Download the TWRP image: Download the TWRP image for the Fire HD 8 from the official TWRP website.
- Boot into Fastboot mode: Press and hold the Power button and the Volume down button simultaneously to boot into Fastboot mode.
- Install TWRP: Follow the instructions provided with the TWRP image to install TWRP on your Fire HD 8.
Step 3: Install the Custom ROM
Now that TWRP is installed, you can install the custom ROM on your Fire HD 8.
- Download the custom ROM: Download the custom ROM you want to install from the Amazon Fire HD 8 forums.
- Boot into TWRP: Press and hold the Power button and the Volume down button simultaneously to boot into TWRP.
- Install the custom ROM: Follow the instructions provided with the custom ROM to install it on your Fire HD 8.
Conclusion
The Amazon Fire HD 8 (10th Generation) is a great device on its own, but with a custom ROM, you can unlock its full potential. Custom ROMs offer a wide range of benefits, including customization options, new features, and better performance. By following the steps outlined in this article, you can install a custom ROM on your Fire HD 8 and take your device to the next level.
Top Tips and Tricks
Here are some top tips and tricks for customizing your Amazon Fire HD 8 (10th Generation) with a custom ROM:
- Research, research, research: Before installing a custom ROM, make sure to research the ROM and its compatibility with your device.
- Backup your data: Before installing a custom ROM, make sure to backup your data to prevent loss.
- Be patient: Installing a custom ROM can take time, so be patient and follow the instructions carefully.
Frequently Asked Questions
Here are some frequently asked questions about custom ROMs for the Amazon Fire HD 8 (10th Generation):
- Q: Is it safe to install a custom ROM on my Fire HD 8? A: Installing a custom ROM can be safe if you follow the instructions carefully and research the ROM thoroughly.
- Q: Will I lose my data when installing a custom ROM? A: Yes, you may lose your data when installing a custom ROM, so make sure to backup your data before installing.
- Q: Can I go back to the original firmware after installing a custom ROM? A: Yes, you can go back to the original firmware by installing the stock ROM on your Fire HD 8.
By following the steps outlined in this article and being aware of the top tips and tricks, you can unlock the full potential of your Amazon Fire HD 8 (10th Generation) with a custom ROM.
When looking for a custom ROM for the Amazon Fire HD 8 (10th Generation, codename "Karna"), the landscape is quite different from standard Android tablets like Samsung or Pixel. Because Amazon locks the bootloader and uses a customized OS, the development scene has had to work around these restrictions.
Here is a breakdown of the top features and options regarding custom ROMs for this specific device.
1. The "Top" Option: FireTools (The De-Bloater/Modifier)
Currently, the most popular, stable, and "top" recommendation for the average user isn't a full custom ROM replacement, but a sophisticated tool called FireTools. More features : Custom ROMs often offer features
- What it is: A modular application that allows you to modify the stock Amazon Fire OS without unlocking the bootloader or voiding your warranty.
- Top Features:
- Google Apps Installation (GApps): It automates the installation of the Google Play Store, Play Services, and YouTube, which are natively blocked on Fire tablets.
- Debloating: It allows you to disable or remove Amazon bloatware (like Amazon Shop, Amazon Music, and the heavy advertising on the lock screen).
- Disable OTA Updates: This prevents Amazon from breaking your modifications with a forced update.
- Performance Boost: By removing Amazon’s heavy UI overlay, the tablet runs significantly faster.
- Why this is the top choice: Installing a full custom ROM on the 10th Gen requires opening the tablet physically to short a pin on the motherboard (a "hardware exploit") to unlock the bootloader. FireTools avoids this risk entirely while providing a near-stock Android experience.
Summary: Which should you choose?
| Feature | FireTools (Stock OS Modified) | LineageOS (Custom ROM) | | :--- | :--- | :--- | | Difficulty | Easy (Plug in, click buttons) | Hard (Requires opening hardware) | | Warranty | Preserved (Reversible) | Voided | | Stability | 100% Stable | Very Good, but beta software | | Ads | Disabled via modifications | Gone completely | | Performance | Good (Better than stock) | Excellent (Lightweight OS) |
Recommendation: If you want to get the most out of your Fire HD 8 10th Gen without risking a bricked device, FireTools combined with the Nova Launcher app is widely considered the "Top" setup. It gives you 90% of the benefits of a custom ROM (no ads, Play Store, faster speed) with 10% of the effort.
You can find FireTools easily on GitHub or the XDA Developers forums for the Amazon Fire HD 8 (2020).
The Amazon Fire HD 8 10th Generation is widely regarded as one of the best values in the budget tablet market, offering decent hardware for a very low price. However, the software experience is often the biggest drawback for enthusiasts. Fire OS, Amazon’s custom version of Android, is heavily integrated with Amazon services, lacks the Google Play Store out of the box, and is filled with advertisements and bloatware. This has led many users to search for the top custom ROMs to unlock the full potential of their device. Transforming this tablet into a clean, stock Android machine is a popular goal, but it comes with specific challenges unique to the 10th Generation model.
Before exploring the top software options, it is crucial to understand the state of modding for the 10th Generation Fire HD 8. Unlike older models, Amazon has significantly tightened security on this version. To install a custom ROM, you typically need to unlock the bootloader, which usually requires a hardware-level exploit or a specific, unpatched firmware version. For many users, the primary path to a better experience isn't a full ROM but rather the use of the Fire Toolbox. This powerful utility allows you to remove Amazon bloatware, install a custom launcher like Nova, and add Google Play Services without the risks associated with flashing a new operating system.
For those who have successfully bypassed the bootloader restrictions, LineageOS is frequently cited as the top custom ROM for the Fire HD 8 10th Generation. Based on the Android Open Source Project, LineageOS provides a stripped-down, high-performance experience that feels significantly faster than the stock Fire OS. It removes all Amazon tracking and background services, freeing up system resources for the apps you actually use. Because it stays close to stock Android, the interface is intuitive and familiar, making the tablet feel like a much more expensive device.
Another excellent choice for users seeking a specific aesthetic is the Pixel Experience ROM. This ROM is designed to bring the software look and feel of Google’s Pixel phones to other hardware. On the Fire HD 8, this means you get the Pixel launcher, Google fonts, and high-quality wallpapers, along with deep integration of Google Assistant and the Play Store. While developer support for this specific model can fluctuate, it remains a top-tier option for those who want their budget tablet to function as a seamless part of the Google ecosystem.
AOSP-based ROMs also rank high for users who prioritize raw speed and battery life. These builds are essentially the "purest" form of Android, containing only the most basic components required to run the device. By eliminating the extra features found in more complex ROMs, AOSP builds ensure that the modest processor in the 10th Generation Fire HD 8 remains responsive during web browsing and media consumption. This is often the best route for users who want a distraction-free device primarily for reading or light productivity.
However, moving away from Fire OS involves certain trade-offs that every user should consider. One of the most significant issues is the loss of Widevine L1 certification. This often means that while you can run apps like Netflix or Prime Video, they may be capped at standard definition rather than 1080p. Additionally, the process of flashing a custom ROM carries the inherent risk of bricking the device if something goes wrong. Always ensure you are following the most recent guides on community forums like XDA Developers to verify that your specific firmware version is compatible with the latest exploits.
In summary, while the Amazon Fire HD 8 10th Generation is a locked-down device by default, the community has provided several ways to improve the experience. Whether you choose the stability of LineageOS, the polished look of Pixel Experience, or the simplicity of an AOSP build, a custom ROM can breathe new life into this affordable tablet. For those unwilling to risk a full flash, the Fire Toolbox remains the safest and most effective way to reclaim your device from Amazon’s ecosystem.
If you would like a step-by-step guide on how to check your current firmware version or need help deciding if the Fire Toolbox is right for your needs, let me know. Do you know which version of Fire OS your tablet is currently running?
I understand you're looking for a custom ROM for the Amazon Fire HD 8 (10th generation, codename: "Onate").
Here is the direct, realistic answer you need:
Short Answer:
There is currently no fully functional, stable custom ROM (like LineageOS) available for the Fire HD 8 (10th gen).
How to Get Started (Overview)
- Unlock bootloader using the MTKClient method (requires disassembly and a Linux PC or VM).
- Flash a custom recovery (TWRP - Team Win Recovery Project) built for mustang.
- Wipe system, data, cache, and dalvik (Amazon's encryption will cause boot loops if not fully wiped).
- Sideload the ROM .zip and optional GApps (use BitGApps or FlameGApps for Android 11).
- Reboot. First boot takes 5–7 minutes.
The Top Custom ROMs for Fire HD 8 10th Gen
Once unlocked, the world of AOSP (Android Open Source Project) opens up. Here are the top three custom ROMs currently available for the Onn device.
Where to watch for real updates:
- XDA Developers Forums – "Amazon Fire HD 8 (2020/10th gen)" section.
- Search for "Fire HD 8 10th gen bootloader unlock progress" – but as of now, none exists.
The "Showstopper" Issues You Must Know
Before you search for "amazon fire hd 8 10th generation custom rom top" and flash away, consider these permanent drawbacks:
- No Deep Sleep (Some ROMs): If the tablet drains 20% battery overnight in your backpack, it defeats the purpose of a portable reader.
- Camera Issues: The 2MP front and rear cameras work in basic apps, but crash frequently in Zoom or Google Meet. This is a driver issue across all custom ROMs for this device.
- OTA Updates: Unlike a Pixel, you cannot install system updates over the air. You must manually flash new builds via TWRP and re-root if you use Magisk.
- Brick Risk: If you unlock the bootloader incorrectly or flash the wrong
lkb, you will hard brick the device. The MediaTek processor is notoriously difficult to revive via SP Flash Tool.
Conclusion: Which Top Custom ROM Should You Choose?
After testing all the major builds, the hierarchy for the Amazon Fire HD 8 (10th Generation) is clear:
- Go with LineageOS 18.1 (Android 11). It is the most stable, has the best battery life, and utilizes the "Go" optimizations that make 2GB of RAM feel sufficient. It is the top ROM for daily driving.
- Choose crDroid if you are a customization junkie and can tolerate an occasional crash.
- Avoid Android 13 (Lineage 20) unless you specifically want to test the latest features and don't mind charging nightly.
The Fire HD 8 10th Gen is a fantastic piece of hardware held back by software. By installing a custom ROM, you aren't just "debloating" your tablet; you are giving it a second life. Just remember: the journey is hard, the bootloader unlock is scary, but the result is a pure Android tablet that beats anything else at the $50–$80 price point.
Pro Tip: Before searching for downloads, visit the XDA Developers Forum for the "Fire HD 8 2020 (Onn)." The community there maintains the most up-to-date links for these top ROMs.
For the Amazon Fire HD 8 (10th Generation, 2020), there is currently no known way to unlock the bootloader or install a full custom ROM. While older models like the 8th Gen (2018) can run LineageOS 17.1 (Android 10), the 10th Gen remains locked down due to Amazon fixing previous exploits.
However, you can still transform the software experience using tools like Fire Toolbox, which achieves a "near-stock" Android feel without needing to flash a ROM. Best Modification Options (2020 Model)
Since true ROMs are unavailable, users typically use these methods to clean up Fire OS:
Fire Toolbox: This is the gold standard for 10th Gen tablets. It allows you to:
Install Google Play Store: Replaces the limited Amazon Appstore.
Remove Bloatware: Disables standard Amazon apps that slow down the device.
Set a Custom Launcher: Use Nova Launcher or Microsoft Launcher to replace the "shelf" UI.
Disable Lock Screen Ads: Removes the "Special Offers" advertisements.
Sideloading APKs: You can manually install any Android app (.apk) by enabling "Apps from Unknown Sources" in your device settings. Comparison with Older Models (For Context)
If you see guides for LineageOS, they are almost certainly for the 2018 (8th Gen) model. Here is the difference: How To Install Lineage OS On Amazon Fire HD 8 Tablet