MetaMask began previously tested a limited version of its Smart Transactions tech with the Smart Swaps feature (MetaMask, modified by CoinDesk)

Popular Crypto Wallet MetaMask Rolls Out 'Smart Transactions' to Combat Ethereum Front-Running

Summary

MetaMask is introducing Smart Transactions to protect users from MEV, which can increase fees and slow down transactions on Ethereum. The feature uses a virtual mempool to simulate transactions and secure lower fees. It aims to address the $400 million wasted annually on MEV. The virtual mempool will operate differently from private mempools, leveraging builders and searchers to penalize them if they fail to execute transactions at quoted prices. This feature will also provide users with better transaction tracking within MetaMask.