diff --git a/browser/components/attribution/AttributionCode.jsm b/browser/components/attribution/AttributionCode.jsm
index a5241d8af481..59fe86920f09 100644
--- a/browser/components/attribution/AttributionCode.jsm
+++ b/browser/components/attribution/AttributionCode.jsm
@@ -50,6 +50,7 @@ const ATTR_CODE_KEYS = [
   "experiment",
   "variation",
   "ua",
+  "dltoken",
 ];
 
 let gCachedAttrData = null;
diff --git a/browser/components/attribution/test/xpcshell/head.js b/browser/components/attribution/test/xpcshell/head.js
index d8545756aaf3..2e6c46e72266 100644
--- a/browser/components/attribution/test/xpcshell/head.js
+++ b/browser/components/attribution/test/xpcshell/head.js
@@ -48,6 +48,10 @@ let validAttrCodes = [
     code: "ua%3DGoogle%20Chrome%20123",
     parsed: { ua: "Google%20Chrome%20123" },
   },
+  {
+    code: "dltoken%3Dc18f86a3-f228-4d98-91bb-f90135c0aa9c",
+    parsed: { dltoken: "c18f86a3-f228-4d98-91bb-f90135c0aa9c" },
+  },
 ];
 
 let invalidAttrCodes = [
diff --git a/browser/components/newtab/content-src/components/ASRouterAdmin/ASRouterAdmin.jsx b/browser/components/newtab/content-src/components/ASRouterAdmin/ASRouterAdmin.jsx
index 8ca459c56a5b..e0d8e45cc0b1 100644
--- a/browser/components/newtab/content-src/components/ASRouterAdmin/ASRouterAdmin.jsx
+++ b/browser/components/newtab/content-src/components/ASRouterAdmin/ASRouterAdmin.jsx
@@ -527,6 +527,7 @@ export class ASRouterAdminInner extends React.PureComponent {
         experiment: "ua-onboarding",
         variation: "chrome",
         ua: "Google Chrome 123",
+        dltoken: "00000000-0000-0000-0000-000000000000",
       },
     };
   }
@@ -1565,6 +1566,21 @@ export class ASRouterAdminInner extends React.PureComponent {
               />{" "}
             </td>
           </tr>
+          <tr>
+            <td>
+              <b> Download Token </b>
+            </td>
+            <td>
+              {" "}
+              <input
+                type="text"
+                name="dltoken"
+                placeholder="00000000-0000-0000-0000-000000000000"
+                value={this.state.attributionParameters.dltoken}
+                onChange={this.onChangeAttributionParameters}
+              />{" "}
+            </td>
+          </tr>
           <tr>
             <td>
               {" "}
diff --git a/toolkit/components/telemetry/docs/data/environment.rst b/toolkit/components/telemetry/docs/data/environment.rst
index 0f032530119f..7827582f7eed 100644
--- a/toolkit/components/telemetry/docs/data/environment.rst
+++ b/toolkit/components/telemetry/docs/data/environment.rst
@@ -83,6 +83,7 @@ Structure:
           variation: <string>, // name/id of the variation cohort used in the enrolled funnel experiment
           experiment: <string>, // name/id of the enrolled funnel experiment
           ua: <string>, // identifier derived from the user agent downloading the installer, e.g., chrome, Google Chrome 123
+          dltoken: <string>, // Unique token created at Firefox download time. ex: c18f86a3-f228-4d98-91bb-f90135c0aa9c
         },
         sandbox: {
           effectiveContentProcessLevel: <integer>,