Firefox MCP Server

execute_script

Run custom JavaScript code within Firefox browser tabs using Playwright for automation, enabling multi-tab debugging and browser control via MCP-enabled applications.

Instructions

Execute JavaScript in the browser

Input Schema

Name	Required	Description	Default
`script`	Yes
`tabId`	No

Input Schema (JSON Schema)

{
  "properties": {
    "script": {
      "type": "string"
    },
    "tabId": {
      "type": "string"
    }
  },
  "required": [
    "script"
  ],
  "type": "object"
}

This server cannot be installed

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