src/webdrop_bridge/main.py

@@ -7,6 +7,10 @@ import sys
 # This ensures CSS media queries (hover: hover) evaluate correctly for desktop applications
 os.environ["QTWEBENGINE_CHROMIUM_FLAGS"] = "--touch-events=disabled"
 
+# Enable Qt WebEngine Remote Debugging Protocol (Chromium Developer Tools)
+# Allows debugging via browser DevTools at http://localhost:9222 or edge://inspect
+os.environ["QTWEBENGINE_REMOTE_DEBUGGING"] = "9222"
+
 from PySide6.QtWidgets import QApplication
 
 from webdrop_bridge.config import Config, ConfigurationError

src/webdrop_bridge/ui/developer_tools.py

@@ -1,13 +1,9 @@
-"""Developer Tools for WebDrop Bridge.
-
-Uses Qt WebEngine's built-in inspector wiring instead of the remote debugging
-HTTP endpoint. This avoids localhost/port timing issues that can differ between
-development runs and frozen MSI installations.
-"""
+"""Developer Tools for WebDrop Bridge - using Chromium Remote Debugging Protocol."""
 
 import logging
 from typing import Any
 
+from PySide6.QtCore import QTimer, QUrl
 from PySide6.QtWebEngineWidgets import QWebEngineView
 from PySide6.QtWidgets import QVBoxLayout, QWidget
 
@@ -19,7 +15,8 @@ __all__ = ["DeveloperToolsWidget"]
 class DeveloperToolsWidget(QWidget):
     """Embedded Chromium Developer Tools Inspector.
 
-    Attaches a dedicated DevTools page directly to the inspected web page.
+    Loads the Chromium DevTools UI using the Remote Debugging Protocol
+    running on localhost:9222.
 
     Features:
     - Real HTML/CSS Inspector with live editing
@@ -48,7 +45,10 @@ class DeveloperToolsWidget(QWidget):
         self.dev_tools_view = QWebEngineView()
         layout.addWidget(self.dev_tools_view)
 
-        # Directly attach DevTools to the existing page.
-        # This is more robust than relying on the remote debugging HTTP endpoint.
-        self.dev_tools_view.page().setInspectedPage(self.web_view.page())
-        logger.info("Developer Tools attached via QWebEnginePage.setInspectedPage")
+        # Load DevTools after delay to let debugger start
+        QTimer.singleShot(500, self._load_devtools)
+
+    def _load_devtools(self) -> None:
+        """Load the DevTools targets page from localhost:9222."""
+        logger.info("Loading DevTools from http://localhost:9222")
+        self.dev_tools_view.load(QUrl("http://localhost:9222"))

tests/unit/test_developer_tools.py

@@ -1,16 +0,0 @@
-"""Unit tests for DeveloperToolsWidget."""
-
-from PySide6.QtWebEngineWidgets import QWebEngineView
-
-from webdrop_bridge.ui.developer_tools import DeveloperToolsWidget
-
-
-def test_developer_tools_widget_attaches_inspected_page(qtbot):
-    """DeveloperToolsWidget should inspect the provided web view page directly."""
-    web_view = QWebEngineView()
-    qtbot.addWidget(web_view)
-
-    dev_tools = DeveloperToolsWidget(web_view)
-    qtbot.addWidget(dev_tools)
-
-    assert dev_tools.dev_tools_view.page().inspectedPage() is web_view.page()