DisableBuiltinPDFViewer

Disable the built in PDF viewer. PDF files are downloaded and sent externally.

Note

As of Firefox 140, this policy no longer completely disables PDF.js; it changes the handler to send PDF files to the operating system. Embedded PDF files are shown in the browser. If you need to completely disable PDF.js, you can use the PDFjs policy.

Compatibility

Firefox	Firefox ESR	Firefox Enterprise
Available since 60	Available since 60	Available since 149

CCK2 Equivalent: disablePDFjs
OMA-URI: DisableBuiltinPDFViewer
Preferences Affected: N/A

Examples

policies.json

{
  "policies": {
    "DisableBuiltinPDFViewer": true
  }
}

JSON schema

DisableBuiltinPDFViewer JSON schema

{
  "type": "boolean"
}

Windows (GPO)

Software\Policies\Mozilla\Firefox\DisableBuiltinPDFViewer = 0x1 | 0x0

macOS

<dict>
  <key>DisableBuiltinPDFViewer</key>
  <true/> | <false/>
</dict>