A Google Chrome extension was caught injecting JavaScript code on web pages to steal passwords and private keys from cryptocurrency wallets and cryptocurrency portals. From a report: The extension is named Shitcoin Wallet (Chrome extension ID: ckkgmccefffnbbalkmbbgebbojjogffn), and was launched last month, on December 9. According to an introductory blog post, Shitcoin Wallet lets users manage Ether (ETH) coins, but also…