chrome/browser/resources/pdf/manifest.json

{
  // chrome-extension://mhjfbmdgcfjbbpaeojofohoefgiehjai
  "manifest_version": 2,
  "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDN6hM0rsDYGbzQPQfOygqlRtQgKUXMfnSjhIBL7LnReAVBEd7ZmKtyN2qmSasMl4HZpMhVe2rPWVVwBDl6iyNE/Kok6E6v6V3vCLGsOpQAuuNVye/3QxzIldzG/jQAdWZiyXReRVapOhZtLjGfywCvlWq7Sl/e3sbc0vWybSDI2QIDAQAB",
  "name": "<NAME>",
  "version": "1",
  "description": "",
  "offline_enabled": true,
  "incognito": "split",
  "permissions": [
    "chrome://resources/",
    "contentSettings",
    "metricsPrivate",
    "resourcesPrivate",
    {"fileSystem": ["write"]}
  ],
  "mime_types": [
    "application/pdf"
  ],
  "content_security_policy": "script-src 'self' 'wasm-eval' blob: filesystem: chrome://resources; object-src * blob: externalfile: file: filesystem: data:; plugin-types application/x-google-chrome-pdf",
  "mime_types_handler": "index.html"
}