Malicious Browser Extensions

Malicious browser extensions are a common vector for stealing private keys, often masquerading as legitimate wallet tools or DeFi utilities. Once installed, these extensions can monitor the user's web activity, intercept sensitive inputs, and even replace transaction data in real-time.

Because they run within the browser environment, they have direct access to the DOM and can capture data before it is encrypted or sent to the blockchain. Users are often tricked into installing these extensions by promises of increased functionality or better user interfaces.

To mitigate this risk, users should only install well-audited, reputable extensions and avoid using them for high-value transactions. Regularly reviewing and removing unused extensions is a critical security practice.

Browser-based security is inherently limited, so it should never be used as the primary interface for managing large sums of money.