Examine source code of Oakley's Everything Blocker

{
  "manifest_version": 3,
  "name": "Oakley's Everything Blocker",
  "version": "1.0.5",
  "permissions": [
    "declarativeNetRequest",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "oakking2011firefox@gmail.com",
      "strict_min_version": "43.0",
      "strict_max_version": "100.0"
    },
    "gecko_android": {
      "id": "oakking2011firefoxmobile@gmail.com",
      "strict_min_version": "43.0",
      "strict_max_version": "100.0"
    },
    "safari": {
      "strict_min_version": "14",
      "strict_max_version": "20"
    }
  },
  "content_scripts": [
    {
      "js": [
        "blocker.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "warn/warn.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Oakley's Everything Blocker"
  }
}