MetaMask Legacy Web3
Adds MetaMask's legacy window.web3 API to your browser
What is MetaMask Legacy Web3?
MetaMask Legacy Web3 is an add-on for Edge browsers that enables users to interact with the blockchain through outdated websites. It restores the original window.web3 API, which has been deprecated since December 2020 for enhanced security and performance. With this extension, you can access and use older, unmaintained websites that require the legacy API in tandem with the MetaMask wallet.
The MetaMask extension provides an API to websites you visit so they can interact with the blockchain. In the past, we used to provide a complementary API known as window.web3. As of December 2020, we stopped injecting window.web3, which improves security and performance, but can break older and unmaintained websites. Using this extension in combination with the MetaMask wallet enables you to use those older sites as before.
MetaMask Legacy Web3 is relatively safe to use as it requires very minimum permissions.
MetaMask Legacy Web3 has earned a fairly good reputation and likely can be trusted.