--- a/toolkit/components/telemetry/docs/core-ping.rst
+++ b/toolkit/components/telemetry/docs/core-ping.rst
@@ -20,17 +20,17 @@ Submission will be per the Edge server s
 * ``appBuildID`` is the build number
 
 Note: Counts below (e.g. search & usage times) are “since the last
 ping”, not total for the whole application lifetime.
 
 Structure::
 
     {
-      "v": 5, // ping format version
+      "v": 6, // ping format version
       "clientId": <string>, // client id, e.g.
                             // "c641eacf-c30c-4171-b403-f077724e848a"
       "seq": <positive integer>, // running ping counter, e.g. 3
       "locale": <string>, // application locale, e.g. "en-US"
       "os": <string>, // OS name.
       "osversion": <string>, // OS version.
       "device": <string>, // Build.MANUFACTURER + " - " + Build.MODEL
                           // where manufacturer is truncated to 12 characters
@@ -40,16 +40,19 @@ Structure::
                                     // UNIX epoch.
       "defaultSearch": <string>, // Identifier of the default search engine,
                                  // e.g. "yahoo".
       "distributionId": <string>, // Distribution identifier (optional)
       "created": <string>, // date the ping was created
                            // in local time, "yyyy-mm-dd"
       "tz": <integer>, // timezone offset (in minutes) of the
                        // device when the ping was created
+      "searches": <object>, // Optional, object of search use counts in the
+                            // format: { "engine.source": <pos integer> }
+                            // e.g.: { "yahoo.searchbar": 3, "other.searchbar": 1 }
       "experiments": [<string>, …], // Optional, array of identifiers
                                     // for the active experiments
     }
 
 Field details
 -------------
 
 device
@@ -118,16 +121,17 @@ HTTP "Date" header
 This header is used to track the submission date of the core ping in the format
 specified by
 `rfc 2616 sec 14.18 <https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.18>`_,
 et al (e.g. "Tue, 01 Feb 2011 14:00:00 GMT").
 
 
 Version history
 ---------------
+* v6: added ``searches``
 * v5: added ``created`` & ``tz``
 * v4: ``profileDate`` will return package install time when times.json is not available
 * v3: added ``defaultSearch``
 * v2: added ``distributionId``
 * v1: initial version
 
 Notes
 ~~~~~