## Cryptocurrency Hack Exploits Firefox Extensions Blockchain security firm Koi Security has uncovered a large-scale cryptocurrency hacking attempt targeting Firefox users. The attack leverages fake Firefox extensions designed to steal wallet information. ### Fake Extensions Stealing Crypto Wallets According to CryptoPotato, over 40 extensions, mimicking legitimate tools like Coinbase, MetaMask, Trust Wallet, and Phantom, were used to compromise user security. Koi Security reports that these malicious actors have been active since at least April 2025. ### User Action Recommended Upon installation, the fake extensions pilfer wallet information, transmitting it to attacker-controlled servers. Koi Security strongly advises Firefox users to immediately review their installed extensions, remove any suspicious tools, and, if possible, replace their wallet account information to mitigate potential damage. Vigilance is key to protecting your cryptocurrency assets. ```