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Browser — web automation

The Browser panel lets the agent browse the web inside the desktop app. It opens pages, reads content, fills forms, takes screenshots, and interacts with elements — all visible to you in a side panel.

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What it is

The Browser is a built-in web browser that the agent can control. It’s not a separate window — it opens as a panel next to the chat, so you can watch the agent browse in real time. The browser is powered by a headless Chromium instance that runs inside the runtime. It supports:
  • Navigation (open URLs, click links, go back/forward)
  • Page reading (extract text, find elements, scrape content)
  • Form filling (type into inputs, select options, click buttons)
  • Screenshots (capture the full page or a specific element)
  • File downloads (save files from the web to your project folder)
  • Tab management (open multiple tabs, switch between them)

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Opening the Browser

Two approaches:
  1. From the sidebar: Click the Browser icon. A panel opens next to the chat with a URL bar.
  2. From chat: Ask the agent to browse — “open github.com and find the latest release notes for Headmaster.” The agent opens the URL in the Browser panel and starts working.

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What the agent can do

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Read a page

Read the page at https://example.com and summarize the key points.
The agent opens the URL, waits for the page to load, extracts the text content, and summarizes it in the chat.

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Fill a form

Go to https://example.com/contact and fill in the contact form with my name and email from my profile. Don't submit — let me review first.
The agent navigates to the page, fills in the fields, and stops. You review the filled form in the Browser panel and tell the agent to submit or make changes.

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Take a screenshot

Take a screenshot of the dashboard at https://app.example.com.
The agent opens the URL, waits for the page to load, captures a screenshot, and saves it to your project folder. The screenshot also appears in the chat.

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Search the web

Search for "best Python testing frameworks 2026" and list the top 5 results with links.
The agent opens a search engine, runs the query, reads the results page, and extracts the top results.

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Download a file

Download the PDF at https://example.com/report.pdf and save it to my project folder.
The agent opens the URL, downloads the file, and saves it to the project folder. The file appears in the File Manager.

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Browser panel controls

The Browser panel has:
  • URL bar — type a URL and press Enter to navigate. The agent sees where you navigated.
  • Back / Forward — standard browser navigation.
  • Refresh — reload the current page.
  • Tabs — open and switch between multiple tabs.
  • Screenshot — capture the current page.
  • DevTools — open the browser developer tools (for debugging).
You can interact with the browser directly — click links, scroll, fill forms — while the agent is working. The agent sees your interactions and incorporates them.

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Browser and approvals

In Work Along mode, the agent asks for approval before:
  • Navigating to a new URL.
  • Submitting a form.
  • Downloading a file.
  • Clicking a button that triggers an action.
In Run It Yourself and Hands-Off mode, the agent browses without per-action approval.

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Anti-detection

The browser uses anti-detection measures to avoid being blocked by websites that detect automated browsers:
  • Realistic user agent strings.
  • Realistic viewport sizes.
  • Human-like interaction delays.
  • Canvas and WebGL fingerprint randomization.
This helps the agent access sites that would otherwise block a headless browser.

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Browser vs. web search tool

Headmaster has two web-related capabilities:
FeatureWhat it doesWhen to use
Web search toolRuns a search query and returns text results. Fast, no visual.”Search for X and summarize”
Browser panelOpens a real browser, navigates pages, fills forms, screenshots. Visual, interactive.”Open this URL”, “Fill this form”, “Take a screenshot”
The agent picks the right one based on your request. If you need visual output or form interaction, it uses the Browser. If you just need information, it uses the web search tool.