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SKILLS.SH

chrome-devtools

Chrome DevTools integration for debugging, performance analysis, and browser automation via MCP. Provides tools for page navigation, element inspection via snapshots, clicking, form filling, screenshot capture, and JavaScript evaluation Operates on a persistent Chrome profile with automatic browser startup; switch between multiple pages using list_pages and select_page Supports efficient workflows: navigate, wait for content, take snapshots to identify elements by uid , then interact with those elements Handles large outputs via file paths and offers pagination/filtering to minimize data transfer; use take_snapshot for automation and take_screenshot for visual inspection

INSTALLATION
npx skills add https://github.com/chromedevtools/chrome-devtools-mcp --skill chrome-devtools
Run in your project or agent environment. Adjust flags if your CLI version differs.

SKILL.md

$2a

  • Use filePath parameter for large outputs (screenshots, snapshots, traces)
  • Use pagination (pageIdx, pageSize) and filtering (types) to minimize data
  • Set includeSnapshot: false on input actions unless you need updated page state

Tool selection

  • Automation/interaction: take_snapshot (text-based, faster, better for automation)
  • Visual inspection: take_screenshot (when user needs to see visual state)
  • Additional details: evaluate_script for data not in accessibility tree

Parallel execution

You can send multiple tool calls in parallel, but maintain correct order: navigate → wait → snapshot → interact.

Testing an extension

  • Install: Use install_extension with the path to the unpacked extension.
  • Identify: Get the extension ID from the response or by calling list_extensions.
  • Trigger Action: Use trigger_extension_action to open the popup or side panel if applicable.
  • Verify Service Worker: Use evaluate_script with serviceWorkerId to check extension state or trigger background actions.
  • Verify Page Behavior: Navigate to a page where the extension operates and use take_snapshot to check if content scripts injected elements or modified the page correctly.

Troubleshooting

If chrome-devtools-mcp is insufficient, guide users to use Chrome DevTools UI:

If there are errors launching chrome-devtools-mcp or Chrome, refer to https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/main/docs/troubleshooting.md.

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