Cybersecurity firm SlowMist has issued a critical security alert regarding counterfeit browser extensions targeting cryptocurrency users. Mozilla Firefox’s add-on marketplace was found to host over 40 fraudulent Koi crypto wallet extensions.
These malicious extensions pose significant security risks to users who may inadvertently install them. SlowMist’s Chief Information Security Officer issued the warning alongside investigations conducted in collaboration with Koi Security.
The discovery underscores ongoing vulnerabilities in browser-based extension marketplaces used by cryptocurrency holders.