Examine source code of CSDb query

{
  "name": "CSDb query",
  "description": "Search CSDb entries",
  "version": "1.3",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "*://csdb.dk/*",
    "webRequest",
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.min.js"
    ]
  },
  "icons": {
    "16": "/icons/icon_16.png",
    "32": "/icons/icon_32.png",
    "48": "/icons/icon_48.png",
    "128": "/icons/icon_128.png"
  },
  "browser_action": {
    "default_icon": "/icons/icon_32.png",
    "default_title": "CSDb query",
    "default_popup": "popup.html"
  }
}