Examine source code of Reddit Flair Hider Pro

{
  "manifest_version": 3,
  "name": "Reddit Flair Hider Pro",
  "version": "2.2",
  "description": "Hide Reddit posts by flair with auto-detection and dark mode.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "*://*.reddit.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Filter Reddit Flairs",
    "default_icon": "icon.png"
  },
  "icons": {
    "96": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-flair-hider@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}