PDFjs

Disable or configure PDF.js, the built-in PDF viewer.

Compatibility: Firefox 77, Firefox ESR 68.9
CCK2 Equivalent: N/A
Preferences Affected: pdfjs.disabled, pdfjs.enablePermissions

Values

If Enabled is set to false, the built-in PDF viewer is disabled.
If EnablePermissions is set to true, the built-in PDF viewer will honor document permissions like preventing the copying of text.

Windows (GPO)

Software\Policies\Mozilla\Firefox\PDFjs\Enabled = 0x1 | 0x0
Software\Policies\Mozilla\Firefox\PDFjs\EnablePermissions = 0x1 | 0x0

Windows (Intune)

OMA-URI:

./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~PDFjs/PDFjs_Enabled
./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~PDFjs/PDFjs_EnablePermissions

Value (string):

<enabled/>or <disabled/>

macOS

<dict>
  <key>PDFjs</key>
  <dict>
    <key>Enabled</key>
    <true/> | <false/>
    <key>EnablePermissions</key>
    <true/> | <false/>
  </dict>
</dict>

policies.json

{
  "policies": {
    "PDFjs": {
      "Enabled": true | false,
      "EnablePermissions": true | false
    }
  }
}