Before I moved forward I went into LAUNCHER MANAGER (1.1.6) and scrolled all the way down to Miscellaneous Options. Next scroll all the way down to Apps Management.
A popup WARNING click Proceed.
Scroll down and find # Amazon System Webview
com.amazon.webview.chromium and select it.
select permission and inside scroll down and look for these two select each one and grant permission and it should say success. Probably didn’t have to do the READ_EXTERNAL_STORAGE but i did it anyways.
android.permission.READ_EXTERNAL_STORAGE
android.permission.WRITE_EXTERNAL_STORAGE
once success i continued on the below.
Note this finding was random and after doing this i didnt reboot just when and confirmed in downloader at 250931 troy toolbox link works again.. This was done on my firestick 4k max with firmware 8.1.1.6. Maybe it can help others too…..
Now in FTVDB app the Amazon System Webview is showing 61212264 where before on my previous post on my 8.1.1.6 i showed an image of it being 60829632 which is older.
So i was able to fix this issue 403 forbidden by updating my firestick 4k max webview with this version of webview from APK MIRRIOR
Amazon System WebView 136.amazon-webview-v136-7103.7103.169.43 (arm64-v8a + arm-v7a) (Android 8.0+)
Under: Amazon System WebView variants Choose
(arm64-v8a + arm-v7a) (Android 8.0+)
Latest: 136.amazon-webview-v136-7103.7103.169.43 on September 5, 2025 PDT**
Download the apk and rename it to something short you can retype easy in adb shell.
Step 1 - Save it to a simple folder on your computer (e.g. C:\firestick_apk\Amazon_System_WebView_138_tv.apk. Rename it so its short when you adb cmd.
Step 2 - Connect Fire Stick via ADB
If you haven’t already
1. On your Fire Stick:
Settings → My Fire TV › Developer Options
Turn on ADB Debugging and Apps from Unknown Sources
2. On your computer, open Command Prompt or Terminal:
adb connect <your_firestick_ip>
You’ll see a popup on the TV asking to allow — choose Always Allow then OK.
Example IP: adb connect 192.168.1.45
Confirm: adb devices
It should show your Fire Stick as “device”.
Step 3 — Push the APK to Fire Stick
Option 1 — Directly install from your PC:
adb install -r C:\firestick_apk\Amazon_System_WebView_138_tv.apk
-r replaces any user-level version.
If you get “INSTALL_FAILED_ALREADY_EXISTS”, uninstall the user version first:
adb shell pm uninstall -k --user 0 com.amazon.webview.chromium
Edit update as of 2:26am 11/9/2025 Sunday
Fastest and easiest
I also used “atvtools” on my phone to connect to the fire sticks IP. Download the same file above and just hit install and takes about a min or 2 depending how fast your connection. When done just go and check downloader code 250931 and no more 403 forbidden. Works on both my 8.1.1.6 fire stick 4k max.