Examine source code of Holdding Tab

{
  "name": "Holding Tab",
  "description": "__MSG_description__",
  "author": "Andronachi Marian",
  "icons": {
    "48": "_source/icons/48.png",
    "96": "_source/icons/96.png"
  },
  "options_ui": {
    "page": "_source/options.html",
    "open_in_tab": true
  },
  "background": {
    "page": "_source/service.html"
  },
  "permissions": [
    "tabs",
    "storage",
    "unlimitedStorage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b8688840-1212-49e3-a0c4-80391e230c0c}"
    }
  },
  "default_locale": "en",
  "manifest_version": 2,
  "version": "1.0.3"
}