AGENT 05 / 07

Browser

The digital computer operator. It drives web portals via ARIA accessibility trees, handles complex forms, and streams live viewports with 2FA takeover support.

browserfathom worker

browser · autonomous

01What it does

Governed web & desktop interaction

01

ARIA accessibility tree

Navigates complex web applications using semantic accessibility element IDs (@e1..@eN) rather than brittle pixels.

02

Live screen streaming

Streams browser viewports over WebSockets at 1080p for real-time human observation and debugging.

03

2FA & CAPTCHA takeover

Pauses safely when encountering SMS/2FA challenges and grants an exclusive human control mutex lease.

04

CDP browser driving

Direct Chrome DevTools Protocol automation for navigation, clicks, keystrokes, and structured DOM extraction.

05

Session state persistence

Maintains authenticated cookies and local storage across workflows inside isolated Playwright profiles.

06

Token-efficient parsing

Reduces visual browser loop token usage by 90% by processing text trees rather than raw screenshots.

02How it works

From URL to verified web action

1

Target navigation

Launches headless or headed Chrome session and navigates to the target web portal.

2

ARIA snapshot

Captures the accessibility tree and maps interactive elements to unambiguous token IDs.

3

Action execution

Executes clicks, form inputs, dropdown selections, and tab switches via CDP commands.

4

Verification & pause

Detects 2FA challenges; requests operator assistance if manual intervention is required.

5

Data extraction

Extracts clean structured tables and documents directly into the worker memory store.

03Under the hood

The runtime underneath

protocolDirect Chrome DevTools Protocol (CDP) and Playwright service layer
accessibilityNormalized ARIA snapshot tree with depth bounding and interactive element filtering
streamingBinary WebSocket JPEG stream with adaptive quality and cursor overlay
takeoverHuman-in-the-loop mutex lease with operator timeout and session recovery

04Tools

Browser toolset

browser_navigatebrowser_clickbrowser_typebrowser_screenshotbrowser_extractanalyze_imageparse_html

Autonomous computer use with enterprise governance.