What does this mean?
It means there's some people somewhere(China) that are trying to sell Firefox and Google products, which would otherwise be free. Not only is this illegal, copyright infringement, is that these "FoxFire" or "Firefox Lite" or whatevers may well have been modified and could be malicious, like they could in fact be spying on you and sending all your private stuff to China.
If you see Firefox and Google products on Amazon and the developers are not named as Firefox or Mozilla or Google Inc. especially if they're charging money, be suspicious and report it to Amazon if you can.
However for the FoxFire and the Firefox Lite and all the Google apps coming from "Ap Developers and Designers", whoever they are? Still be suspicious though. Firefox comes from Mozilla, and is listed as such, Same with the Google apps, they come from Google Inc. and they don't charge for them. I would report it myself, but I don't have an Amazon account as I'm not in the United States.