Examine source code of PDF Always In Tab

{
  "manifest_version": 3,
  "name": "PDF Always In Tab",
  "description": "Prevents online PDFs from automatically saving to your computer.",
  "author": "ator-dev",
  "version": "1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{14fe3ad7-5c6e-4a74-b54a-66b7ef6769a6}"
    }
  },
  "permissions": [
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset",
        "enabled": true,
        "path": "/rules.json"
      }
    ]
  }
}