Examine source code of Style Consistency Checker

{
  "manifest_version": 2,
  "name": "Style Consistency Checker",
  "version": "1.3",
  "description": "Analyze web pages for inconsistent CSS styles and highlight mismatched elements. Export reports too!",
  "permissions": [
    "activeTab",
    "downloads",
    "storage"
  ],
  "browser_action": {
    "default_title": "Style Consistency Checker",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c530a4aa-e346-4c2d-a473-db1be57dc4d4}"
    }
  }
}