Examine source code of Fastimba

{
  "manifest_version": 2,
  "name": "Fastimba",
  "description": "Adds Vim keybindings, relative line numbers, and Emmet to Scrimba's Monaco editor.",
  "version": "0.3.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "web_accessible_resources": [
    "monaco-bridge.js",
    "pomodoro-bridge.js",
    "audio/chime.ogg",
    "content-scripts/content.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{65E99AB6-4E8F-4BC6-B293-0FE29C73A89E}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://scrimba.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_action": {}
}