Ethereum is an open-source, public, blockchain-based distributed computing platform featuring smart contract (scripting) functionality. Extension Features: 1.Notify you if price goes higher or lower 2.Handle over 33 currency as such BTC/USD/EUR/GBP/INR. 3.Handle multiple precision 4.Quicklinks (Reddit/twitter/..etc) 5.Allow you to select the refresh rate from 10s to once every 4 hours.