Show HN: Agent-browser-shield – free extension to protect AI agents on the web
Agent Browser Shield is a new Chromium extension designed to enhance the security and efficiency of AI agents while browsing. It strips unnecessary page elements to optimize token usage and masks sensitive information to prevent security breaches. The extension is available for installation from the Chrome Web Store and includes a demo site to showcase its effectiveness.
- ▪Agent Browser Shield is a Chromium extension aimed at improving agentic browser use.
- ▪The extension enhances token efficiency by removing distractions and masking sensitive information.
- ▪Users can install the extension from the Chrome Web Store and test its features on a demo site.
Opening excerpt (first ~120 words) tap to expand
agent-browser-shield Alpha prototype: rulesets may change without notice Agent Browser Shield is a Chromium extension for making agentic browser-use more effective and secure: Token efficiency: strip page chrome (footers, cookie banners, chat widgets, sponsored content) so agents spend tokens on the user's task. Security & compliance: mask PII and credentials before they reach the model, and suppress hidden text, HTML comments, and user-generated content that could carry prompt-injection payloads. Accuracy: block manipulative dark patterns and hide engagement rails and other content that could distract the model from the user's task. Install from the Chrome Web Store — works on any Chromium-based browser (Chrome, Edge, Brave, Arc, Opera).
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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.