From d32da2b37527ded2d214b82dba7250d1c2bb7492 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=90=D0=BD=D1=82=D0=BE=D0=BD=20=D0=A2=D1=80=D0=BE=D1=88?=
 =?UTF-8?q?=D0=B8=D0=BD?= <i@atroshin.ru>
Date: Sat, 15 Aug 2026 00:40:26 +0300
Subject: [PATCH] sw.js: ignore non-http(s) and non-GET requests in fetch
 handler

The fetch handler tried to cache every intercepted request, so a
chrome-extension:// request made cache.put() throw 'Request scheme
chrome-extension is unsupported'. Skip non-http(s) and non-GET requests,
and swallow cache-write failures.
---
 frontend/sw.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/frontend/sw.js b/frontend/sw.js
index 2524dd8..8b3d52c 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -33,11 +33,13 @@ self.addEventListener('activate', e => {
 self.addEventListener('fetch', e => {
     // Network-first: the local server is always up, so always serve fresh
     // content and fall back to cache only when offline.
+    if (!e.request.url.startsWith('http')) return;
+    if (e.request.method !== 'GET') return;
     e.respondWith(
         fetch(e.request)
             .then(r => {
                 const clone = r.clone();
-                caches.open(CACHE).then(c => c.put(e.request, clone));
+                caches.open(CACHE).then(c => c.put(e.request, clone)).catch(() => {});
                 return r;
             })
             .catch(() => caches.match(e.request))