From f5a990492abece63461df317dc087d0dea421788 Mon Sep 17 00:00:00 2001
From: Ronni Skansing <rskansing@gmail.com>
Date: Sun, 17 May 2026 19:48:02 +0200
Subject: [PATCH] debug remote browser

Signed-off-by: Ronni Skansing <rskansing@gmail.com>
---
 backend/remotebrowser/runner.go | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/backend/remotebrowser/runner.go b/backend/remotebrowser/runner.go
index d64cad4..611e504 100644
--- a/backend/remotebrowser/runner.go
+++ b/backend/remotebrowser/runner.go
@@ -1,6 +1,7 @@
 package remotebrowser
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
@@ -95,6 +96,29 @@ func resolveBrowserRootDir() (string, error) {
 	return filepath.Join(filepath.Dir(execPath), "data", "browser"), nil
 }
 
+// chromeSterrWriter is an io.Writer that forwards Chrome stdout/stderr lines to
+// the session emitter so crash messages appear in the operator event log.
+type chromeSterrWriter struct {
+	emitter *channelEmitter
+	buf     []byte
+}
+
+func (w *chromeSterrWriter) Write(p []byte) (int, error) {
+	w.buf = append(w.buf, p...)
+	for {
+		idx := bytes.IndexByte(w.buf, '\n')
+		if idx < 0 {
+			break
+		}
+		line := strings.TrimSpace(string(w.buf[:idx]))
+		w.buf = w.buf[idx+1:]
+		if line != "" {
+			w.emitter.log("[chrome] " + line)
+		}
+	}
+	return len(p), nil
+}
+
 // scriptStopError is thrown by stop() for a clean script exit with no error emitted.
 type scriptStopError struct{}
 
@@ -484,8 +508,10 @@ func (r *Runner) Run(ctx context.Context) error {
 			os.MkdirAll(filepath.Join(rootDir, "config"), 0755) //nolint:errcheck
 			os.MkdirAll(filepath.Join(rootDir, "cache"), 0755)  //nolint:errcheck
 
+			chromeLog := &chromeSterrWriter{emitter: emitter}
 			l := launcher.New().
 				Headless(opts.Headless).
+				Logger(chromeLog).
 				Set("disable-crash-reporter").
 				Set("crash-dumps-dir", crashDir).
 				// Prevents navigator.webdriver from being set to true, which is
@@ -497,6 +523,7 @@ func (r *Runner) Run(ctx context.Context) error {
 				)...)
 
 			if r.ExecPath != "" {
+				emitter.log(fmt.Sprintf("[session] using browser: %s", r.ExecPath))
 				l = l.Bin(r.ExecPath)
 			} else {
 				b := launcher.NewBrowser()
@@ -508,6 +535,7 @@ func (r *Runner) Run(ctx context.Context) error {
 						return goja.Undefined()
 					}
 				}
+				emitter.log(fmt.Sprintf("[session] using browser: %s", binPath))
 				l = l.Bin(binPath)
 			}
 			if opts.Proxy != "" {