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.
Hacker News (AI / LLM) files mainly under ai. We currently carry 3,266 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | GitHub |
| Canonical URL | https://github.com/pixiebrix/agent-browser-shield |
| Publication time | Wed, 03 Jun 2026 16:23:24 +0000 |
| Retrieval time | 2026-06-03T16:26:47.479Z |
| Last seen | 2026-06-03T16:26:47.479Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | buUUhPtknQ8O |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
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.