Examine source code of X Theme Engine

{
  "manifest_version": 3,
  "name": "X Theme Engine",
  "version": "2.0.0",
  "description": "A private theme, media, style, and focus engine for x.com with presets, custom palettes, schedules, and declutter controls.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png",
    "512": "icons/icon-512.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "X Theme Engine",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "sidebar_action": {
    "default_panel": "popup/sidebar.html",
    "default_title": "X Theme Engine",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.x.com/*",
        "*://*.twitter.com/*"
      ],
      "js": [
        "shared/themes.js",
        "content/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "xthemes@rob.projects",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}