SelfHost BrowserSubProcess support #5202

zangetsudo · 2025-12-11T13:31:15Z

zangetsudo
Dec 11, 2025

does CefSharp-81.3.100 support https://github.com/cefsharp/CefSharp/wiki/SelfHost-BrowserSubProcess how do i make it run with SelfHost BrowserSubProcess ?

what i have done:

wpf:

public static class Program
{            
	[STAThread]
	public static int Main(string[] args)
	{
        InitWebBrowser();
        var app = new App();
        app.InitializeComponent();			
		return app.Run();
	}
}

InitWebBrowser:

var cachePath = Path.Combine(localCachePath);
var logFile = Path.Combine(localCachePath, "cef_sharp_mini_debug.log");

Cef.EnableWaitForBrowsersToClose();

var settings = new CefSettings();

settings.LogSeverity = LogSeverity.Verbose;
settings.CefCommandLineArgs.Add("--enable-logging");
settings.CefCommandLineArgs.Add("--v=1");
settings.CefCommandLineArgs.Add("--no-proxy-server", "1");
settings.RemoteDebuggingPort = 8088;
settings.RootCachePath = cachePath;
settings.CachePath = Path.Combine(cachePath, "global");
settings.BrowserSubprocessPath = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;

settings.LogFile = logFile;
settings.UncaughtExceptionStackSize = 10;
if (DebuggingSubProcess)
{
    var architecture = Environment.Is64BitProcess ? "x64" : "x86";
}
CefSharpSettings.FocusedNodeChangedEnabled = true;
var bph = new BrowserProcessHandler();
if (!Cef.Initialize(settings, performDependencyCheck: false, browserProcessHandler: bph))
{
    throw new Exception("Unable to Initialize Cef");
}

App.manifest:

true PerMonitorV2,PerMonitor

project settings : both of cefsharp.core cefsharp.browsersubprocess.core:
Project->Setting -> Link-> "Category" -> “Output” -> "Stack allocations" -> "Reserve:" : 8388608

WPF project settings :

1701;1702;1591
false
8388608

console log:

[1211/204053.665:VERBOSE1:pref_proxy_config_tracker_impl.cc(185)] 00000276985EEEA0: set chrome proxy config service to 00000276985EF300
[1211/204053.687:VERBOSE1:webrtc_internals.cc(119)] Could not get the download directory.
[1211/204056.745:VERBOSE1:pref_proxy_config_tracker_impl.cc(185)] 000002769F120630: set chrome proxy config service to 000002769F121AA0
[1211/204103.415:VERBOSE1:pref_proxy_config_tracker_impl.cc(185)] 000002769F21E5A0: set chrome proxy config service to 000002769861A7E0
[1211/204103.428:VERBOSE1:video_capture_oracle.cc(92)] Auto-throttling is enabled.
[1211/204103.428:VERBOSE1:capture_resolution_chooser.cc(204)] Recomputed snapped frame sizes: 1366x768
[1211/204103.428:VERBOSE1:capture_resolution_chooser.cc(156)] Recomputed capture size from 640x360 to 1366x768 (100% of ideal size)
[1211/204103.441:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204103.617:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204103.630:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.540:INFO:cpu_info.cc(53)] Available number of cores: 12
[1211/204105.556:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204105.559:VERBOSE1:v8_context_snapshot.cc(153)] A context is created from snapshot for main world
[1211/204105.560:VERBOSE1:script_context.cc(117)] Created context:
extension id: (none)
frame: 000005189D4A2338
URL:
context_type: WEB_PAGE
effective extension id: (none)
effective context type: WEB_PAGE
[1211/204105.560:VERBOSE1:script_context.cc(117)] Created context:
extension id: (none)
frame: 0000000000000000
URL:
context_type: UNSPECIFIED
effective extension id: (none)
effective context type: UNSPECIFIED
[1211/204105.561:VERBOSE1:dispatcher.cc(368)] Num tracked contexts: 1
[1211/204105.566:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.567:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.568:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.568:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.570:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.570:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.605:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.605:INFO:CONSOLE(1)] "[ww-open-data] Missing referer for jwxwork.js. See: https://xxx
[1211/204105.614:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204105.615:VERBOSE1:capture_resolution_chooser.cc(204)] Recomputed snapped frame sizes: 1366x768
[1211/204105.616:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.998:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204105.998:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.003:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.031:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.032:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.032:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.033:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.033:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.033:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.130:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204106.430:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204106.430:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204106.431:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204106.431:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204106.431:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204106.431:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.445:INFO:cpu_info.cc(53)] Available number of cores: 12
[1211/204108.458:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.461:VERBOSE1:v8_context_snapshot.cc(153)] A context is created from snapshot for main world
[1211/204108.461:VERBOSE1:script_context.cc(117)] Created context:
extension id: (none)
frame: 000000AC08A22338
URL:
context_type: WEB_PAGE
effective extension id: (none)
effective context type: WEB_PAGE
[1211/204108.462:VERBOSE1:script_context.cc(117)] Created context:
extension id: (none)
frame: 0000000000000000
URL:
context_type: UNSPECIFIED
effective extension id: (none)
effective context type: UNSPECIFIED
[1211/204108.462:VERBOSE1:dispatcher.cc(368)] Num tracked contexts: 1
[1211/204108.476:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.759:VERBOSE1:CONSOLE(5)] "Main._createAppUI: 14.599853515625ms", source: devtools://devtools/main/MainImpl.js (5)
[1211/204108.764:VERBOSE1:CONSOLE(5)] "Main._showAppUI: 4.577880859375ms", source: devtools://devtools/main/MainImpl.js (5)
[1211/204108.791:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.799:VERBOSE1:CONSOLE(5)] "Main._initializeTarget: 6.998046875ms", source: devtools://devtools/main/MainImpl.js (5)
[1211/204108.830:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.830:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.831:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.832:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204108.834:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204108.835:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204108.835:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: https://xxx
[1211/204108.900:VERBOSE1:CONSOLE(5)] "Main._lateInitialization: 0.60595703125ms", source: devtools://devtools/main/MainImpl.js (5)
[1211/204108.956:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.957:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.957:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.957:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.997:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204108.997:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.000:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.000:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.001:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.011:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.011:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.316:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.316:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.317:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.317:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.317:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.317:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.317:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.318:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.318:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.320:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.320:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.320:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.320:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.321:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.321:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.321:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.336:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.336:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.337:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.337:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.337:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.338:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204109.338:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204111.511:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204111.511:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204111.514:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204111.524:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204111.524:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204111.525:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204112.272:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed
[1211/204122.896:VERBOSE1:v8_context_snapshot.cc(153)] A context is created from snapshot for main world
[1211/204122.899:ERROR:paint_controller.cc(561)] PaintController::FinishCycle() completed

the WebBrowser is running ok, but EvaluateScriptAsync hangs forever.
if i run the script from the devtools(by add the code of : browser.ShowDevTools(); ), the result is ok btw.
i'v seen #4728 but did't give me anther thought.

any help without upgrade to hight version of cefsharp will be appreciated.

zangetsudo · 2025-12-11T13:32:13Z

zangetsudo
Dec 11, 2025
Author

WPF project settings : <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net4.7-windows|x64'"> <NoWarn>1701;1702;1591</NoWarn> <Prefer32Bit>false</Prefer32Bit> <StackReserveSize>8388608</StackReserveSize>  </PropertyGroup>

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Dec 11, 2025

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Dec 11, 2025
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