How to Detect AI Chat Platforms in Chrome Extensions Using URL and DOM Checks
Developers building Chrome extensions for AI chat platforms like ChatGPT, Claude, Gemini, and Copilot need a reliable way to identify which platform is active before executing any scripts. The recommended approach uses a two-tier detection system: first checking the page's hostname for a fast, near-instant match, then falling back to DOM signature patterns for edge cases like embedded interfaces or white-label deployments. DOM-based detection uses a majority-vote method, requiring at least two structural checks to pass, which reduces false positives on unrelated pages. Because AI chat platforms are single-page applications that load their UI asynchronously, extensions should inject content scripts at document_idle rather than document_start to ensure the DOM is ready. Together, hostname detection covers over 95% of real-world cases, with DOM-based fallback serving as a safety net for the remainder.
This is an AI-generated summary. ShortSingh links to the original source for the complete article.
Discussion (0)
Log in to join the discussion and vote.
Log in