Examine source code of Simple Password Viewer

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "version": "1.0",
  "description": "__MSG_appDesc__",
  "icons": {
    "48": "icons/surprise-48.png"
  },
  "author": "Nivas",
  "developer": {
    "name": "Nivas",
    "url": "https://github.com/nivaska"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "browser_action": {
    "default_icon": "icons/surprise-32.png",
    "default_title": "Password Viewer"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb9082a5-d619-4614-b126-9dd0e968a05f}"
    }
  }
}