Examine source code of CashBOX Watcher

{
  "manifest_version": 2,
  "name": "CashBOX Watcher",
  "version": "1.0.6",
  "description": "Данное расширение предназначено для оповещения о новых задачах и контроля выполнений задач на сайте cashbox.ru",
  "icons": {
    "48": "img/Cashbox_48.png",
    "96": "img/Cashbox_96.png"
  },
  "browser_action": {
    "default_icon": {
      "64": "img/polygon-64-pen.png"
    },
    "default_title": "CashBOX Watcher"
  },
  "background": {
    "scripts": [
      "js/static.js",
      "js/storeddata.js",
      "js/tempdata.js",
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/static.js",
        "js/content_script.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "activeTab",
    "*://*/*"
  ],
  "applications": {
    "gecko": {
      "id": "watcher@cashbox.ru",
      "strict_min_version": "88.0"
    }
  }
}