Mask Network is a browser extension that serves as a portal bridging Web2.0 and Web3.0, enabling users to access decentralized internet features directly within familiar social media platforms like X (formerly Twitter) and Facebook. It allows users to compose and share encrypted posts privately with contacts, trade cryptocurrency tokens, view and utilize NFT profile pictures, participate in crypto lucky draws, and exchange encrypted files without leaving their current social media interface. The software enhances privacy and interoperability by integrating blockchain functionality into existing social networks. It is available as a free extension for Chrome, Firefox, and Opera browsers. The project is open source under the AGPL license and supports community contributions through bug reporting, translation efforts, and developer documentation. Key use cases include secure communication, on-chain asset management, and decentralized digital identity without requiring users to migrate to a new platform.