From c3426fd9c565fbcc9d082b7fcc6567b96db70511 Mon Sep 17 00:00:00 2001
From: sun-yryr <me@sun-yryr.com>
Date: Wed, 10 Dec 2025 00:56:58 +0900
Subject: [PATCH] fix: chrome.runtime.sendMessage now returns a Promise

---
 src/messaging/implementation.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/messaging/implementation.ts b/src/messaging/implementation.ts
index e6999753..d74ac457 100644
--- a/src/messaging/implementation.ts
+++ b/src/messaging/implementation.ts
@@ -7,7 +7,11 @@ export function buildMessenger(chromeApi: ChromeApi): CrossScriptMessenger {
       chromeApi.runtime.onMessage.addListener(callback);
     },
     send(message) {
-      chromeApi.runtime.sendMessage(message);
+      // In manifest v3, sendMessage returns a Promise that rejects if no receiver exists.
+      // We need to catch and ignore this error to prevent uncaught promise rejections.
+      chromeApi.runtime.sendMessage(message).catch((error) => {
+        console.debug("Message send failed", { message, error });
+      });
     },
   };
 }