Examine source code of Image Mood Reader

{
  "manifest_version": 2,
  "name": "Image Mood Reader",
  "version": "1.0",
  "description": "Analyze image color tones and brightness to suggest mood (happy, sad, warm, cold).",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Image Mood Reader",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9806521-5713-49f3-9956-ae00d5c69eb6}"
    }
  }
}