CBR and CBZ files are comic book content files for e-readers. You can install CBR files to the Kindle Fire and view them with a comic book viewer application, such as Perfect Viewer, Comixology or Droid Comic Viewer. Make sure your Kindle Fire is connected to a wireless network, then download and install the reader app. After the reader app is installed, you can sideload CBR files to the Kindle by connecting the device to your computer with the USB data cable and transferring the files. Warnings Writer Bio

How to Install CBR Files on a Kindle  8 Steps  - 22