Examine source code of Jbzd Comment Collapser

{
  "manifest_version": 3,
  "name": "Jbzd Comment Collapser",
  "version": "0.0.1",
  "description": "Adds hiding comment threads on jbzd.",
  "content_scripts": [
    {
      "matches": [
        "https://*.jbzd.com.pl/obr/*"
      ],
      "js": [
        "CommentWrap.js"
      ],
      "css": [
        "CommentWrap.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "res/arrow.png",
        "res/arrow_hover.png"
      ],
      "matches": [
        "https://*.jbzd.com.pl/*"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "icon/48.png",
    "96": "icon/96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jcc@s-triangle.com"
    }
  }
}