What is an agentic browser? Definition and examples

An agentic browser is a web browser with a built-in AI agent that can read pages and act on them for its user: clicking, filling in forms and finishing tasks.

How it works

The user describes a task in plain language. The browser's AI agent looks at the current page, plans steps, and carries them out in the user's own session: opening pages, scrolling, typing into fields, pressing buttons. The user can watch, step in or take over.

Examples as of October 2026:

• Gemini in Chrome. Google's "auto browse" feature handles tasks such as booking parking for an event or updating a recurring online order. In August 2026 Google made it available to AI Pro and AI Ultra subscribers on Android in the U.S., and says it is designed to ask for confirmation before completing some sensitive tasks (Google).
• Perplexity Comet. A browser with an assistant built in; Perplexity made it free to download worldwide in October 2025 (CNBC).

Most agentic browsers today work out a page the way a person does, from its layout and text. Proposals such as WebMCP let a site describe its actions to the agent directly, and Google said at I/O 2026 that Gemini in Chrome will soon support WebMCP APIs (Chrome for Developers).

Why it matters for your website

An agentic browser visit is a real customer, acting through software. If the agent can't complete your demo form or find your prices, the customer's task fails, and they may move on to a site where it works.

Things that tend to help agents and people alike:

• Clear forms. Visible labels, sensible field names, plain error messages, no required fields hidden behind extra steps.
• Text over images. Prices, plan limits and contact details in HTML text.
• Predictable flows. Avoid multi-step wizards where a single page would do.
• Honest content. Agents read everything, including hidden text, which is also where prompt injection hides. Browser vendors add confirmations for exactly that reason.

Example

A user tells their browser: "Request a demo from the three vendors in this comparison and use my work email."

1. The agent opens each vendor's demo page.
2. Vendor A has a five-field form with labeled inputs. The agent fills it in and asks the user to confirm before submitting.
3. Vendor B uses a chat-only flow. The agent answers the chat's questions and books a slot.
4. Vendor C requires a phone number in a field labeled only with an icon. The agent can't tell what it wants, so it reports back that this one needs the user's attention.

Related terms

• AI agent: the software inside the browser.
• WebMCP: a proposed way for sites to describe actions to browser agents.
• Prompt injection: the main safety risk agents face on the open web.
• Agentic commerce: agents buying on a user's behalf.
• AI crawler: automated fetchers that index pages, as opposed to agents acting for one user.