Examine source code of Mobile Enhancer

{
  "manifest_version": 2,
  "name": "Mobile Enhancer",
  "version": "1.0",
  "description": "Enhance mobile usability of websites by applying responsive styles and improving navigation.",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fd2dd504-783a-4a10-a6bb-ae6bda96ac6c}"
    }
  }
}