I have had the fakespot add-on for a long time and it worked beautifully until I 1st got the notice that it had been acquired by Mozilla. I have had Mozilla products for years and love them, but Fakespot no longer works well when I am logged into Amazon. I do not shop at e-Bay much so can't comment on that or any other website, but if it continues to be difficult to use with Amazon I will have to uninstall it.