From 2a283d98a37759bf817e5869132a3585436c26e7 Mon Sep 17 00:00:00 2001
From: Michael Comella <michael.l.comella@gmail.com>
Date: Fri, 22 Nov 2024 13:06:15 -0800
Subject: [PATCH] fix: add suggestion to 'cannot use... autogenerated' msg
 (#3309)

---
 src/cmd/sign.js | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/cmd/sign.js b/src/cmd/sign.js
index 4a848131e2..bbbea5788f 100644
--- a/src/cmd/sign.js
+++ b/src/cmd/sign.js
@@ -66,8 +66,18 @@ export default function sign(
     if (idFromSourceDir && !id) {
       throw new UsageError(
         'Cannot use previously auto-generated extension ID ' +
-          `${idFromSourceDir} - This extension ID must be specified in the manifest.json file.`,
-      );
+          `${idFromSourceDir} - This extension ID must be specified in the manifest.json file. For example:
+
+    // manifest.json
+    {
+        "browser_specific_settings": {
+            "gecko": {
+                "id": "${idFromSourceDir}"
+            }
+        },
+
+    ...
+    }`);
     }
 
     if (!id) {