Launching today
Agent Browser Shield
Block prompt inject & cut token costs for AI browser agents
61 followers
Block prompt inject & cut token costs for AI browser agents
61 followers
AI agents browsing the web have a problem: they read everything — cookie banners, hidden instructions, dark patterns — and can't tell real content from a trap. Agent Browser Shield sits between your agent and the web, stripping prompt injections, masking PII, removing dark patterns, and filtering page noise that burns tokens. Free, source-available, works with browser-use and Browserbase.
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The prompt-injection angle is obviously important, but the token-noise part is what stood out to me. When using browser agents for research/social workflows, the annoying failure mode is often less "one malicious instruction" and more the agent wasting context on cookie banners, nav, footers, and hidden junk before it reaches the actual page content.
Curious if Agent Browser Shield exposes a diff or trace of what it stripped from the page. That would be really useful for debugging false positives, especially when a page has weird layout or important content that looks like boilerplate.
Congrats on the launch — this feels like one of those unglamorous layers that becomes necessary once browser agents move from demos to real workflows.