Examine source code of Pro Coffee Measure

{
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "popup.js"
      ]
    }
  ],
  "name": "Pro Coffee Guide Launcher",
  "description": "Quick launch Pro Coffee Guide",
  "version": "1.0.0",
  "icons": {
    "20": "icon.jpg",
    "48": "icon48.png",
    "126": "icon_128.png"
  },
  "browser_action": {
    "default_icon": "icon48.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab"
  ]
}