Examine source code of 4chan Reddit-like frontend

{
  "manifest_version": 3,
  "name": "4chan Reddit-like frontend",
  "version": "1.0.1",
  "description": "Turns 4chan threads into a Reddit-style nested, collapsible view with inline media, a gallery, and custom colors.",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_title": "4chan Reddit-like frontend",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://boards.4chan.org/*/thread/*"
      ],
      "js": [
        "src/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "4chan2reddit@local.dev",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}