"Powered by Mozilla. Putting people before profits since 1998." - Mozilla

Mozilla, from what I've seen, your company has been dedicated to providing your users privacy and great tools to combat tracking of all forms. This tool/add-on directly goes against those ideals and has started a rift between you and your customers/users, especially through your endorsement of this product. The product does not work on Amazon, as it promises, and it takes a lot more of my data than I am comfortable with.
I really don't want to leave this platform, but the more you sell out to shady companies, like this and Amazon, the less inclined I am to believe you are serious about internet safety and security. Please, get rid of this add-on, or fix it. Money is not everything. Once you give in to money as your primary reasoning behind these shady decisions, you will have failed the users completely.