“MetaMask for CMT” is an extension for accessing CyberMiles enabled distributed applications, or "Dapps" in your normal Chrome browser!
The extension injects the CyberMiles web3 API into every website's javascript context, so that dapps can read from the blockchain.
MetaMask also lets the user create and manage their own identities, so when a Dapp wants to perform a transaction and write to the blockchain, the user gets a secure interface to review the transaction, before approving or rejecting it.
Because it adds functionality to the normal browser context, MetaMask requires the permission to read and write to any webpage.
谷歌浏览器、其他Chromium内核的浏览器