How do browser extension scams hijack personal data?

Malicious browser extensions can hijack personal data through sophisticated techniques. They often disguise themselves as legitimate software, tricking users into installation. Once installed, these extensions can capture sensitive information like cookies, keystrokes, and browsing history by injecting malicious code. This code can monitor user actions, steal passwords, and exfiltrate data to cybercriminals' servers^[1][3].

To choose safe add-ons, only download extensions from official sources like the Chrome Web Store or Microsoft Edge Add-on Store. Always check reviews, verify the developer's information, and be cautious of excessive permissions requested during installation^[1][6].