Firefox DevTools MCP

MCPOpen SourceMIT14.2

by freema • Frontend & UI

An MCP server that automates Firefox via WebDriver BiDi, enabling MCP clients (Claude, Cursor, etc.) to control and inspect Firefox for browsing, testing, and scraping tasks.

Example Use Cases

1
Navigate web pages, manage multiple tabs, and control page lifecycle (open/close/select/navigate) in a real Firefox browser.
2
Inspect and interact with DOM snapshots via stable UIDs (click/fill/hover/drag) to perform reliable automated UI actions.
3
Capture and analyze network requests, console logs, and screenshots for debugging, testing, or data collection workflows.

Description

This server exposes Firefox DevTools functionality over the Model Context Protocol using Selenium WebDriver BiDi, letting agents list and manage pages, take DOM snapshots, interact with elements by UID, capture network requests and console output, and take screenshots. It is intended for local use (requires a local Firefox installation) and can be run via npx, Docker, or a built build. Useful for automating UI workflows, collecting network/console traces, and driving browser interactions from LLM agents and developer tooling.

Capabilities(24 total)

Tools (24)

list_pages

List open tabs (index, title, URL). Selected tab is marked.

new_page

Open new tab at URL. Returns tab index.

url:string*

navigate_page

Navigate selected tab to URL.

url:string*

select_page

Select active tab by index, URL, or title. Index takes precedence.

pageIdx:numberurl:stringtitle:string

close_page

Close tab by index.

pageIdx:number*

Quick Actions

View on GitHub

Security

Scanned 2 month(s) ago

Risk Level

MINIMAL

Read-only data retrieval, no side effects

Trust Score

C63/100

11/17 checks passed

Scores are informational only and provided “as is” without warranty. AgentHotspot assumes no liability for actions taken based on these ratings.

Quick Stats

Service TypeMCP

Pricing ModelFree

Capabilities24 Tools / 0 Prompts / 0 Resources

Ownerfreema

CategoryFrontend & UI

DependenciesStandalone

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