Security May 8, 2026 • 1 min read

Online Shopping Extension Security: Is Your Shopping Extension Safe?

Cyber Security

Extensions have access to your browser's most intimate data. Choosing the right online shopping extension isn't just about saving money; it's about protecting your digital identity. In 2026, the stakes for your favorite shopping extension are higher than ever.

The "Data for Discounts" Trap

Many "free" extensions make their money by selling your browsing history to advertisers. You might save $5 on a shirt, but you're paying with your privacy. At SensiBuy, we operate on a strictly local-first architecture for our shopping assistant tool. We don't track you across the web (or at all); there are zero servers connected to the extension and zero third-party API calls. Additionally, we have a blocklist to enable users to prevent SensiBuy from ever running a scan on sites where you don't want it to. We only provide automatic online shopping assist on the supported retail pages, which is a list you can edit in the settings.

Signs of a Secure Extension

  • Minimal Permissions: Does the online shopping tool really need access to your clipboard or microphone?
  • Transparent Manifest: Secure tools like SensiBuy use the latest Manifest V3 protocols for restricted background execution.
  • Verified Sandboxing: Our UI runs in an isolated iframe, ensuring it can never interfere with your passwords or banking details.
  • Blocklists: In cases where an extension requires broad access, is there a way to keep it from running where you explicitly don't want it to?

Security is the foundation of SensiBuy's online shopping assistant experience. Shop with the confidence that your data stays where it belongs—with you.