SitePolicies

Defines policies scoped to specific sites.

Compatibility: Firefox 150, Firefox ESR 153
Preferences Affected: N/A

The policy is made up of a list of rules that are evaluated in order. Each can contain:

• Match which is a list of sites. An empty list or missing property means to match all sites.
• Exceptions is also a list of sites which when matched bypasses this set of rules.
• Policies is an object defining the policies.

Currently the only supported policies are:

• DisableJit which when true disables the JIT engine for the site.

It is important to note that a site here refers to a registerable domain so *.example.com is a valid site but *.com is not. * can also be used to refer to all sites.

For example this setting would disable the JIT for only *.example.com:

[
  {
    "Match": ["*.example.com"],
    "Policies": {
      "DisableJit": true
    }
  }
]

While this setting would disable the JIT on every site except *.example.org:

[
  {
    "Exceptions": ["*.example.org"],
    "Policies": {
      "DisableJit": true
    }
  }
]

Examples

policies.json

{
  "policies": {
    "SitePolicies": [
      {
        "Match": [
          "*.example.com"
        ],
        "Policies": {
          "DisableJit": true
        }
      },
      {
        "Exceptions": [
          "*.example.org"
        ],
        "Policies": {
          "DisableJit": true
        }
      }
    ]
  }
}

JSON schema

SitePolicies JSON schema

{
  "type": "array",
  "items": {
    "type": "object",
    "properties": {
      "Match": {
        "type": "array",
        "items": {
          "type": "string"
        }
      },
      "Exceptions": {
        "type": "array",
        "items": {
          "type": "string"
        }
      },
      "Policies": {
        "type": "object",
        "properties": {
          "DisableJit": {
            "type": "boolean"
          }
        }
      }
    },
    "required": [
      "Policies"
    ]
  }
}

Windows (GPO)

Software\Policies\Mozilla\Firefox\SitePolicies (REG_MULTI_SZ) =
[
  {
    "Exceptions": ["*.example.com"],
    "Policies": {
      "DisableJit": true
    },
  }
]

Windows (Intune)

OMA-URI:

./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/SitePolicies

Value (string):

<enabled/>
<data id="JSON" value='[
  {
    "Exceptions": ["*.example.com"],
    "Policies": {
      "DisableJit": true
    },
  }
]'/>

macOS

<dict>
  <key>SitePolicies</key>
  <array>
    <dict>
      <key>Exceptions</key>
      <array>
        <string>*.example.com</string>
      </array>
      <key>Policies</key>
      <dict>
        <key>DisableJit</key>
        <true/>
      </dict>
    </dict>
  </array>
</dict>