Firefox DevTools FAQs

Question 1

What are the core capabilities of Firefox DevTools MCP?

Accepted Answer

It provides extensive tools for page navigation, element interaction (click, fill, drag), content inspection, always-on capture of network requests and console events, detailed screenshot capture, script evaluation, and advanced browser control including WebExtension management and Firefox preference manipulation.

Question 2

What is Firefox DevTools MCP?

Accepted Answer

Firefox DevTools MCP is a Model Context Protocol (MCP) server that allows AI assistants to inspect, control, and automate the Firefox browser using the WebDriver BiDi (Bidirectional) protocol, leveraging Selenium WebDriver.

Question 3

Can I automate an already running Firefox browser session?

Accepted Answer

Yes, you can use the `--connect-existing` option to attach to an active Firefox browser session. Note that BiDi-dependent features like console and network event capture may not be available in this mode.

Question 4

Which AI assistants or clients are compatible with Firefox DevTools MCP?

Accepted Answer

Firefox DevTools MCP is designed to work with AI clients that support the Model Context Protocol (MCP), including Claude Code, Claude Desktop, Cursor, and Cline, enabling robust browser automation workflows.

Question 5

Does this tool require a local Firefox installation?

Accepted Answer

Yes, Firefox DevTools MCP operates locally and requires a Firefox browser (version 100+) installed on your machine. It cannot run directly on cloud hosting services.

Firefox DevTools

Firefox DevTools

Key Features

Use Cases

Key Features

Use Cases