Examine source code of Album

{
  "manifest_version": 2,
  "version": "1.0.12resigned1",
  "default_locale": "en",
  "name": "__MSG_extName__",
  "short_name": "__MSG_extShortName__",
  "description": "__MSG_extDescription__",
  "applications": {
    "gecko": {
      "id": "album@projectestac"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Album",
    "default_icon": {
      "19": "icons/icon19.png",
      "32": "icons/icon32.png",
      "38": "icons/icon38.png"
    }
  },
  "permissions": [
    "activeTab",
    "notifications",
    "storage"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "19": "icons/icon19.png",
    "24": "icons/icon24.png",
    "32": "icons/icon32.png",
    "38": "icons/icon38.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png",
    "192": "icons/icon192.png"
  }
}