Browser add-ons: hidden threats and smart safety tips

Browser add-ons can be incredibly useful, but they also sit inside the gateway to your digital life. Rogue extensions posing as ad blockers, AI helpers, PDF tools, or even security add-ons have compromised millions of users. Before you click Install, understand the risks and how to reduce them.

Why extensions attract attackers

• Extensions can read and modify what you see, including browsing history, saved logins, and session cookies.
• People often trust anything from official stores, giving attackers cover.
• In businesses, extensions can evade security oversight. A 2023 review of 300,000 extensions and OAuth apps found 51% of extensions were high risk.

How risky extensions get installed

• Lookalikes on official stores using popular keywords.
• Bundled with freeware or pushed through deceptive links.
• Sideloaded from third-party sites that skip security reviews.
• Legit extensions hijacked or bought by threat actors, then updated with malicious code.
• Dormant add-ons that turn harmful after activation or a later update.

What malicious extensions can do

• Steal data: passwords, session cookies, browsing history, and financial details; some log keystrokes or scrape the clipboard.
• Redirect you to phishing pages or malware-laced websites.
• Inject intrusive ads or malware into pages you load.
• Backdoor your browser to enable future remote access.
• Run hidden cryptomining that slows or damages your device.

How to choose and use extensions safely

• Prefer official browser stores; avoid sideloading from third-party sites.
• Vet the publisher: developer site, history, update cadence, and independent reviews.
• Check permissions: if access to passwords or all browsing data isn’t essential, don’t grant it.
• Install only what you truly need; remove unused or suspicious add-ons.
• Keep your browser up to date to block known exploits.
• Enable multi-factor authentication on accounts to limit damage if cookies or passwords leak.
• Consider a secured browser mode from a reputable security suite for banking and crypto transactions.
• Turn on features like Enhanced Safe Browsing to warn about dangerous sites.
• Run trusted security software and schedule regular scans.

Bottom line
Every extension is a trust decision. Balance convenience against potential exposure, keep permissions minimal, and stick with well-vetted developers.

Source: WeLiveSecurity