What is Binance Chain Extension Wallet (BEW)? BEW Expansion Wallet is the official Binance crypto wallet that grants simultaneous access to Binance Smart Chain , Binance Chain , and Ethereum . The extension allows users to securely store cryptocurrencies and connect to thousands of projects on different blockchains. The wallet is currently available on Chrome, Firefox and Brave browsers. The birth of a more efficient key management solution Key management is an age-old problem in the cryptosphere.