http://programmer.ie/tags/browser-security/ Recent content in Browser Security on Programmer.ie: Modern AI programming Hugo en-us Wed, 02 Sep 2026 17:45:00 +0100 http://programmer.ie/books/browser-ai-from-first-principles/20-chapter/ Wed, 02 Sep 2026 17:45:00 +0100 http://programmer.ie/books/browser-ai-from-first-principles/20-chapter/ <p>Before tools, malicious page text could mislead a model&rsquo;s answer.</p> <p>After tools, the same text may influence an action.</p> <p>Prompt injection becomes an authority problem when untrusted content shares a reasoning context with executable capabilities.</p> <hr> <h2 id="1-identify-the-trust-domains">1. Identify the trust domains</h2> <p>A browser agent may combine:</p> <ul> <li>user instructions;</li> <li>developer policy;</li> <li>page content;</li> <li>tool descriptions;</li> <li>tool results;</li> <li>prior session state.</li> </ul> <p>They are all text to the model. They are not equally authoritative.</p>