While the devices themselves are legal, users are able to install additional applications that give them access to copyrighted material - like box office films, or Premier League football matches

The company has now announced that anyone caught using its Amazon Marketplace to sell devices that "promote, facilitate or enable" illegal access to copyrighted TV and films for free will now have their accounts suspended.

"Any streaming media player or other device that violates this policy is prohibited from sale on Amazon."

Of course, this doesn't stop people from buying "clean" Kodi boxes, and then downloading the copyright infringing add-ons themselves.

What are the penalties for sellers?

The penalties for sellers are high - and could result in time behind bars.

In December 2016, Terry O'Reilly was sentenced to four years imprisonment for selling illegal set-top TV boxes, a prosecution brought by the Premier League with support from FACT.

Meanwhile in February, set-top boxes pre-loaded with Kodi streaming software were seized at the homes of the five suspects in Bolton, Bootle, Cheadle, Manchester and Rhyl.

It is believed the suspects made in the region of £250,000 selling the devices online.

How to get Kodi on an Amazon Fire Stick

1. Uploading Kodi to your Fire TV Stick will give you a lot of extra content, as well as the ability to run interesting addons – and it only takes a few minutes to set up.
2. To start the process, users must first navigate to Settings > System > Developer Options. To use Kodi, you'll need to make sure "Apps from Unknown Sources" is turned ON. This will let you run apps from outside Amazon’s app ecosystem, including Kodi.
3. Next, you'll need a file-management program, or a way of manipulating files on your Fire TV Stick. ES File Explorer is among the most popular.
4. As well as being a great way to manage local files, ES File Explorer also makes it possible to easily download third-party content. Navigate to the left of the program to “Add” and you’ll be presented with a box to fill in.
5. In the textbox marked "Path", you need to enter the following download address for Kodi: http://kodi.tv/download . Then add the link to your favourites.
6. You need to click on the ARM link once – it’s a bit fiddly to find, but play around with the cursor and you’ll get there with a bit of patience.
7. Once you’ve clicked on the ARM link nothing will happen – but don’t panic, this is totally normal. You just need to navigate your way to the three dots in the bottom-right-hand corner, click on them and select "Open in new Browser". This may take some time to do.
8. Once Kodi has downloaded, selected Open File > Install. A dialogue box will appear, asking for permission to install. Go ahead and agree to them, and then select Install again.
9. You can now stream films, movies and TV shows on your Amazon Fire TV Stick.

More Add ons for KODI

"Kodi is open source software, and as long as the GPL (General Public License) is followed, you are welcome to do with it as you like," Kodi Product Manager Nathan Betzen told TorrentFreak last year.