Socket Now Protects the Firefox Extension Ecosystem
Blog post from Socket
Socket has introduced experimental Firefox extension protection for enterprise customers, proactively scanning more than 97,000 extensions in Mozilla’s official add-ons directory and monitoring updates for malware, risky behavior, excessive permissions, data collection, suspicious infrastructure, and code changes. The company argues that browser extensions represent an enterprise security blind spot because trusted extensions can gain broad access to browser data and later introduce credential theft, clipboard monitoring, traffic redirection, or data exfiltration through automatic updates without requesting new permissions. Socket’s research identified 77 related Firefox extension identities active between March and August 2026, including 40 confirmed malicious extensions and 37 deceptive sports-score extensions linked through shared code and infrastructure; several reportedly evolved from benign-looking tools into wallet-stealing or credential-harvesting malware. The new service analyzes extension code, metadata, network activity, version histories, and ecosystem relationships rather than relying only on declared permissions, helping organizations identify installed extensions, assess their behavior, and detect risky changes across Firefox and Chrome.
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