Examine source code of Chrome Shack

{
  "manifest_version": 3,
  "name": "Chrome Shack",
  "version": "1.78",
  "description": "Collection of scripts for Shacknews.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{33a5e61a-ec1e-4761-9515-e7ab23a8b679}",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "96": "images/icon96.png",
    "128": "images/icon-chrome-web-store.png",
    "144": "images/icon144.png"
  },
  "action": {
    "default_icon": "images/icon16.png",
    "default_title": "Chrome Shack",
    "default_popup": "src/popup.html"
  },
  "options_ui": {
    "page": "src/permissions.html"
  },
  "background": {
    "scripts": [
      "background.global.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "content_scripts": [
    {
      "js": [
        "content.global.js"
      ],
      "css": [
        "style.css"
      ],
      "all_frames": false,
      "run_at": "document_end",
      "matches": [
        "https://www.shacknews.com/chatty*"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "scripting",
    "notifications",
    "alarms"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "images/offtopic.png",
        "images/political.png",
        "images/stupid.png",
        "images/interesting.png",
        "images/shack.png",
        "images/dinogegtik.png",
        "images/sparkly1.jpg",
        "images/sparkly2.jpg",
        "images/sparkly3.jpg",
        "images/sparkly4.jpg",
        "images/sparkly5.jpg",
        "images/sparkly6.jpg"
      ]
    }
  ]
}