Examine source code of Rosy Number Translator

{
  "name": "Rosy Number Translator",
  "version": "1.1",
  "description": "Numbers to sinhala words converter",
  "permissions": [
    "storage"
  ],
  "short_name": "Rosy",
  "content_scripts": [
    {
      "run_at": "document_end",
      "all_frames": true,
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "24": "icon24.png",
      "32": "icon32.png"
    },
    "default_title": "Translate your numbers to sinhala with Rosy.",
    "default_popup": "popup.html"
  }
}