Certificates: Install

Install certificates into the Firefox certificate store. If only a filename is specified, Firefox searches for the file in the following locations:

• Windows
  • %USERPROFILE%\AppData\Local\Mozilla\Certificates
  • %USERPROFILE%\AppData\Roaming\Mozilla\Certificates
• macOS
  • /Library/Application Support/Mozilla/Certificates
  • ~/Library/Application Support/Mozilla/Certificates
• Linux
  • /usr/lib/mozilla/certificates
  • /usr/lib64/mozilla/certificates
  • ~/.mozilla/certificates

Starting with Firefox 65, Firefox 60.5 ESR, a fully qualified path can be used, including UNC paths. You should use the native path style for your operating system. We do not support using %USERPROFILE% or other environment variables on Windows.

If you are specifying the path in the policies.json file on Windows, you need to escape your backslashes (\\) which means that for UNC paths, you need to escape both (\\\\). If you use group policy, you only need one backslash.

Certificates are installed using the trust string CT,CT,.

Binary (DER) and ASCII (PEM) certificates are both supported.

Compatibility: Firefox 64, Firefox ESR 64
CCK2 Equivalent: certs.ca
Preferences Affected: N/A

Windows (GPO)

Software\Policies\Mozilla\Firefox\Certificates\Install\1 = "cert1.der"
Software\Policies\Mozilla\Firefox\Certificates\Install\2 = "C:\Users\username\cert2.pem"

Windows (Intune)

OMA-URI:

./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~Certificates/Certificates_Install

Value (string):

<enabled/>
<data id="Certificates_Install" value="1&#xF000;cert1.der&#xF000;2&#xF000;C:\Users\username\cert2.pem"/>

macOS

<dict>
  <key>Certificates</key>
  <dict>
    <key>Install</key>
    <array>
      <string>cert1.der</string>
      <string>/Users/username/cert2.pem</string>
    </array>
  </dict>
</dict>

policies.json

{
  "policies": {
    "Certificates": {
      "Install": ["cert1.der", "/home/username/cert2.pem"]
    }
  }
}