chrome/browser/resources/pdf/manifest.json

{
  // chrome-extension://mhjfbmdgcfjbbpaeojofohoefgiehjai
  "manifest_version": 2,
  "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDN6hM0rsDYGbzQPQfOygqlRtQgKUXMfnSjhIBL7LnReAVBEd7ZmKtyN2qmSasMl4HZpMhVe2rPWVVwBDl6iyNE/Kok6E6v6V3vCLGsOpQAuuNVye/3QxzIldzG/jQAdWZiyXReRVapOhZtLjGfywCvlWq7Sl/e3sbc0vWybSDI2QIDAQAB",
  "name": "Chrome PDF Viewer",
  "version": "1",
  "description": "Chrome PDF Viewer",
  "offline_enabled": true,
  "permissions": [
    "file://*/",
    "http://*/",
    "https://*/",
    "streamsPrivate"
  ],
  "background": {
    "scripts": ["background.js"],
    "transient": true,
    "persistent": false
  },
  "offline_enabled": true,
  "mime_types": [
    "application/pdf"
  ],
  "web_accessible_resources": [
    "pdf.html"
  ]
}