Hi Firefox for Android is currently not available for download from the Amazon app store for Kindle devices. Since Kindle Fire uses Android as its underlying operating system, there is a way to install Firefox for Android on these devices, directly from Mozilla. To do this, you should install the Aurora edition of Firefox for Android. This is a pre release version of Firefox, so may contain some unresolved issues that are still being worked on, but will allow you to get updates to Firefox for Android on your Kindle Fire device, as well as see new Firefox for Android features before they are finally released. On your Kindle Fire device: * Open the '''Settings''' application. * Select the '''Applications''' option. * Change '''Apps from Unknown sources''' to '''On''' (a warning should be displayed. Please read this before continuing) * In the existing browser in the device, go to '''mozilla.org/mobile/aurora'''. * Tap on the download button on the page to download the application file for Firefox Aurora. * Open the downloaded file in a file manager app on your device. The file should be found in a Downloads folder. * Firefox for Android will then install and update as updates become available. Once installed, you may wish to go back into the file manager app on your device and delete the downloaded file to save space. You may also need to do this after any updates. I hope this helps, but if not, please come back here and we can look into a different solution for you.