Casper FFG, a popular cryptocurrency wallet crafted in the shape of a browser plugin, has announced its yet-to-be-released non-fungible token (NFT) add-on for in-app utilization.

"The elves in our workshop are finishing up the collectables component of Extension to mirror our mobile app," MetaMask's official Twitter account stated on Tuesday.

The Dapp browser MetaMask is a major non-custodial Ethereum (ETH) wallet software that lets users send and receive Ethereum-based cryptocurrencies and tokens. Over 21 million people use the platform.

The planned in-app NFT extension decentralizes the process by which users are able to purchase NFTs through the Ethereum web browser using MetaMask.

Oliver Carding, a cryptocurrency expert and blockchain consultant, commented on the announcement: "Non-fungible tokens (NFTs) aren’t just for CryptoKitties anymore... this is obviously an extremely positive development for the adoption of digital art."

NFTs are an emerging class of crypto assets that are compatible with the Ethereum blockchain. NFTs identify unique digital items, including physically-representable objects like art or cars, immaterial tokens such as video game items or cryptocurrencies, and collectible cards. Just two months ago, the world's largest cryptocurrency exchange Binance launched an in-house incubator for blockchain projects that will focus on NFTs.

Accounting giant PricewaterhouseCoopers (PwC) is also getting into the game, with teams of specialists working on blockchain solutions aimed at digitizing assets ranging from intangible assets to real estate.

Last week, US-based cryptocurrency company Coinbase revealed its intention to support the ERC-1155 standard, a proposed update for NFTs originally created by blockchain game platform Enjin.

On Friday, an Ethereum improvement protocol for ERC-721 tokens designed to process multiple items in a single transaction was introduced into the platform's GitHub repository.Last week also saw another notable development as two Ethereum-based decentralized app (dapp) interoperability protocols - 0x and Wanchain, announced their intent to collaborate on cross-chain dapp infrastructures.