Add ideas about comments in JSON. Fixes #1006

README.md

@@ -4,6 +4,19 @@
 
 Policies can be specified using the [Group Policy templates on Windows](https://github.com/mozilla/policy-templates/tree/master/windows), [Intune on Windows](https://support.mozilla.org/kb/managing-firefox-intune), [configuration profiles on macOS](https://github.com/mozilla/policy-templates/tree/master/mac), or by creating a file called `policies.json`. On Windows, create a directory called `distribution` where the EXE is located and place the file there. On Mac, the file goes into `Firefox.app/Contents/Resources/distribution`.  On Linux, the file goes into `firefox/distribution`, where `firefox` is the installation directory for firefox, which varies by distribution or you can specify system-wide policy by placing the file in `/etc/firefox/policies`.
 
+Unfortunately, JSON files do not support comments, but you can add extra entries to the JSON to use as comments. You will see an error in about:policies, but the policies will still work properly. For example:
+
+```
+{
+  "policies": {
+    "Authentication": {
+      "SPNEGO": ["mydomain.com", "https://myotherdomain.com"]
+    }
+    "Authentication_Comment": "These domains are required for us"
+  }
+}
+```
+
 | Policy Name | Description
 | --- | --- |
 | **[`3rdparty`](#3rdparty)** | Set policies that WebExtensions can access via chrome.storage.managed.