Downloadable image files containing trading cards, artwork, memes, and sneakers authenticated by non-fungible tokens (NFTs); downloadable software for creating, managing, exchanging, and authenticating non-fungible tokens, avatars, cryptocurrencies, and digital images and assets based on blockchain technology; downloadable computer software for managing cryptocurrency transactions using blockchain technology; downloadable internet browser software for blocking ads in websites; downloadable software for blocking ads in websites; downloadable browser extension software for automatically deleting cookies; downloadable browser extension software for implementing HTTPS on all websites