Examine source code of Make website unusable

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.5",
  "icons": {
    "64": "icons/logo.png"
  },
  "applications": {
    "gecko": {
      "id": "onenglar@gmail.com",
      "strict_min_version": "60.0"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "default_locale": "en"
}