Stealth browser
This pack gives an agent browser navigation, scraping, clicking, typing, screenshot and DOM snapshot tools. It uses puppeteer-extra, puppeteer-extra-plugin-stealth, puppeteer-core and cheerio with a local Chrome executable.
Installation
npm install @framers/agentos-ext-stealth-browser
Peer dependency: @framers/agentos with range >=0.10.40.
Usage
import { AgentOS } from '@framers/agentos';
const agentos = await AgentOS.create({
extensionManifest: {
packs: [
{
package: '@framers/agentos-ext-stealth-browser',
options: {
headless: true,
timeout: 30000,
viewport: { width: 1920, height: 1080 },
},
},
],
},
});
Configuration
| Option | Secret id | Environment variable | Required | Default |
|---|---|---|---|---|
headless | None | None | no | Unset through factory; launches headed |
timeout | None | None | no | Unset through factory; passed to Puppeteer |
userAgent | None | None | no | Random selection from the built-in pool |
viewport (object with width and height) | None | None | no | Unset through factory; no viewport override |
executablePath | None | None | no | OS-specific Chrome path |
enableEvasions | None | None | no | Enabled unless false |
priority | None | None | no | 50; a falsy value also uses this default |
Context logger | None | None | no | Unset |
Context onActivate | None | None | no | Unset |
Context onDeactivate | None | None | no | Unset |
Set headless, timeout and viewport explicitly to use the values in the example. The factory passes undefined properties that overwrite the service constructor's defaults. Use these flat option names rather than the manifest's dotted configuration names.
logger.info receives lifecycle messages. The context callbacks run on activation and deactivation; deactivation closes the browser before invoking the callback.
Tools
| Tool | What it does |
|---|---|
stealth_navigate | Navigates with anti-detection enabled and returns page text, links and optional HTML. |
stealth_scrape | Extracts content from the current page using a CSS selector. |
stealth_click | Waits for an element to become visible and clicks it. |
stealth_type | Types into an input field with a default keystroke delay. |
stealth_screenshot | Captures the current page or a selected element. |
stealth_snapshot | Returns a DOM snapshot of interactive elements, links and forms. |
stealth_navigate
| Parameter | Type | Required | Description |
|---|---|---|---|
url | string | yes | The URL to navigate to |
waitFor | string, enum: load, domcontentloaded, networkidle0, networkidle2; default: networkidle2 | no | When to consider navigation complete |
returnHtml | boolean, default false | no | Include full HTML in response |
returnText | boolean, default true | no | Include extracted text in response |
returnLinks | boolean, default true | no | Include all links found on the page (text + href) |
maxTextLength | number, default 50000 | no | Maximum characters of page text to return (default 50000) |
stealth_scrape
| Parameter | Type | Required | Description |
|---|---|---|---|
selector | string | yes | CSS selector to match elements |
limit | number, minimum one | no | Maximum number of elements to return |
attributes | array of strings | no | Specific attributes to extract |
stealth_click
| Parameter | Type | Required | Description |
|---|---|---|---|
selector | string | yes | CSS selector for the element to click |
waitForNavigation | boolean, default false | no | Wait for page navigation after click |
stealth_type
| Parameter | Type | Required | Description |
|---|---|---|---|
selector | string | yes | CSS selector for the input element |
text | string | yes | Text to type |
delay | number, default 50 | no | Delay between keystrokes (ms). Defaults to 50 for human-like typing. |
clear | boolean, default false | no | Clear existing text before typing |
stealth_screenshot
| Parameter | Type | Required | Description |
|---|---|---|---|
fullPage | boolean, default false | no | Capture full scrollable page |
selector | string | no | CSS selector for specific element to capture |
format | string, enum: png, jpeg, webp; default: png | no | Image format |
quality | number, minimum zero, maximum 100, default 80 | no | Quality for jpeg/webp (0 to 100) |
stealth_snapshot
| Parameter | Type | Required | Description |
|---|---|---|---|
includeLinks | boolean, default true | no | Include links in snapshot |
includeForms | boolean, default true | no | Include forms in snapshot |
Notes
The browser launches lazily when a tool first uses it and remains shared across the pack's tools until deactivation. The default executable paths are C:\Program Files\Google\Chrome\Application\chrome.exe on Windows, /Applications/Google Chrome.app/Contents/MacOS/Google Chrome on macOS and /usr/bin/google-chrome on Linux. Set executablePath for another location.
Clicking and typing change the page and can trigger its actions. Launch flags disable the browser sandbox and web security and allow insecure content. enableEvasions: false skips applying the stealth plugin for that service, but the service still applies launch flags, HTTP headers and page-level overrides.
Navigation failures return partial content with a zero status and an error console message; the navigation tool still returns success: true for that result. Scrape failures return an empty element list. Click and type failures return success: false.
Navigation text is truncated to maxTextLength, with truncation metadata. The service retains at most 100 console messages. Screenshots return base64 image data; reported dimensions come from the viewport. A zero screenshot quality falls back to 80.
License
Apache-2.0