Examine source code of Threads Image CORS Fixer

{
  "manifest_version": 3,
  "name": "Threads Image CORS Fixer",
  "version": "1.0.1",
  "description": "Fixes CORS issues on Threads by modifying headers via DNR.",
  "browser_specific_settings": {
    "gecko": {
      "id": "threads-cors-fix@tsaiid.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "icon.png",
    "64": "icon@2x.png"
  },
  "permissions": [
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "*://*.threads.com/*",
    "*://*.instagram.com/*",
    "*://*.cdninstagram.com/*",
    "*://*.fbcdn.net/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  }
}