Examine source code of i-list

{
  "name": "i-list",
  "description": "Improve experience in f-list.net",
  "version": "1.3",
  "icons": {
    "48": "icons/i-list.ico"
  },
  "manifest_version": 2,
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "https://www.f-list.net/*"
      ],
      "js": [
        "f-list.js"
      ]
    }
  ],
  "permissions": [
    "https://www.f-list.net/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "i-list@extension.mine"
    }
  }
}