diff --git a/scripts/start.mjs b/scripts/start.mjs
index 561a298..d795ce6 100644
--- a/scripts/start.mjs
+++ b/scripts/start.mjs
@@ -36,6 +36,12 @@ if (existsSync(profilePath)) {
       writeAddonProxyFile();
     }
   } else {
+    if (
+      existsSync(profilePath) &&
+      !existsSync(path.join(profilePath, "extensions"))
+    ) {
+      mkdirSync(path.join(profilePath, "extensions"));
+    }
     writeAddonProxyFile();
   }