Since support has been dropped for Adobe Flash, it’s difficult to get it to work on the Amazon Kindle Fire. There is a way it can be done though. Just follow these steps.
- Allow installation of applications from unknown sources by going to “Apps” > “Settings” > “Applications” > “Apps From Unknown Sources” > “On” or “Settings” > “More” > “Device” > “Allow Installation of Applications” > “On” depending on the model of your particular Fire.
- Open the Silk web browser and go to the Mozilla FTP site.
- Select the file that ends with the extension of “.apk“.
- A notification should appear at the top of the screen that says “Downloading“. This should switch to “Download complete“. Tap the notification area at the top of the screen.
- Tap the “Download complete” selection.
- Select “Install“.
- Open Firefox, then go to “Menu” > “Display” > “Plugins” and set it to “Enabled“.
- Ensure Firefox is closed to where it is not running at all.
- Download and install Flash Player for Android (options toward the bottom of the linked page).
- A notification should appear at the top of the screen that says “Downloading”. This should switch to “Download complete”. Tap the notification area at the top of the screen.
- Tap the “Download complete” selection.
- Select “Install“.
- Restart the Kindle Fire.
- Open the “Flash Player” app.
- If prompted, choose to perform the action using “Firefox“.
- Select the “Tap here to activate plugin” option.
- Select to run Flash using “Local Storage” or “Peer-Assisted Networking“. Personally, I use “Local Storage“.
- You are now ready to use Flash in Firefox on your Fire. You can test it by going here.
By default, all areas of web pages that display Flash content will say “Tap here to activate plugin”. If you want flash to load these areas automatically, select “Menu” 
at the upper-right corner > “Settings” > “Display” > “Plugins” and set them to “Enabled“.
These steps have been tested on the Amazon Fire, HD6, HD7, HD8, and HD10 and work.
Luis says
You are the best. Instructions were on point. Helped me greatly at work.
Mitch Bartlett says
As long as you got the APK file from a reliable source (like APK Mirror) there is no need for concern.
Christine says
When ready to download, I get the message “this type of file may harm your device”. Concerned I should not download. Any experience?
Tony says
Doesn’t appear to work for me on my Fire HD. Every time I attempt to launch Flash it crashes Firefox.