Tamper Data → <Pro>

Never trust client‑side data. All validation must be re‑checked on the server.

Logs will show an inconsistent amount compared to what the UI allowed (e.g., HTML step attribute or min value). tamper data

Tamper Data operates as a within the browser. It hooks into the browser’s networking stack to intercept requests at the application layer. Never trust client‑side data

The original extension used Firefox’s deprecated XPCOM APIs: tamper data