Here is the stack trace for https://boring-easley-d4cbde.netlify.app/: ``` xul!mozilla::CycleCollectedJSContext::PerformMicroTaskCheckPoint + 0x2b0 xul!mozilla::CycleCollectedJSContext::LeaveMicroTask + 0x13 xul!mozilla::nsAutoMicroTask::~nsAutoMicroTask + 0x1d xul!mozilla::EventListenerManager::HandleEventSubType + 0x1ee xul!mozilla::EventListenerManager::HandleEventInternal + 0x4e6 xul!mozilla::EventListenerManager::HandleEvent + 0x8d xul!mozilla::EventTargetChainItem::HandleEvent + 0x29c xul!mozilla::EventTargetChainItem::HandleEventTargetChain + 0x485 xul!mozilla::EventDispatcher::Dispatch + 0xfe5 xul!mozilla::EventDispatcher::DispatchDOMEvent + 0xf7 xul!mozilla::DOMEventTargetHelper::DispatchEvent + 0x45 xul!mozilla::dom::EventTarget::DispatchEvent + 0x34 xul!mozilla::dom::MessageEventRunnable::DispatchDOMEvent + 0x4b2 xul!mozilla::dom::MessageEventRunnable::WorkerRun + 0x74 xul!mozilla::dom::WorkerRunnable::Run + 0x2b9 xul!nsThread::ProcessNextEvent + 0x569 xul!NS_ProcessNextEvent + 0x4a xul!mozilla::dom::WorkerPrivate::DoRunLoop + 0x349 xul!mozilla::dom::workerinternals::`anonymous namespace'::WorkerThreadPrimaryRunnable::Run + 0x4d4 xul!nsThread::ProcessNextEvent + 0x569 xul!NS_ProcessNextEvent + 0x4a xul!mozilla::ipc::MessagePumpForNonMainThreads::Run + 0x96 xul!MessageLoop::AutoRunState::~AutoRunState + 0xf xul!MessageLoop::Run + 0x84 xul!nsThread::ThreadFunc + 0x121 nss3!_PR_NativeRunThread + 0x13a nss3!pr_root + 0xa ucrtbase!thread_start<unsigned int (__cdecl*)(void *),1> + 0x42 KERNEL32!BaseThreadInitThunk + 0x14 mozglue!mozilla::interceptor::FuncHook<mozilla::interceptor::WindowsDllInterceptor<mozilla::interceptor::VMSharingPolicyShared>,void (*)(int, void *, void *)>::operator() + 0xe mozglue!patched_BaseThreadInitThunk + 0x6e ntdll!RtlUserThreadStart + 0x21 ``` After Rob's comment I installed uBlock origin and launched Tor Browser on a debugger (as I already had the needed symbols), and I detected a crash: ```
Bug 1744719 Comment 7 Edit History
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Here is the stack trace for https://boring-easley-d4cbde.netlify.app/: ``` xul!mozilla::CycleCollectedJSContext::PerformMicroTaskCheckPoint + 0x2b0 xul!mozilla::CycleCollectedJSContext::LeaveMicroTask + 0x13 xul!mozilla::nsAutoMicroTask::~nsAutoMicroTask + 0x1d xul!mozilla::EventListenerManager::HandleEventSubType + 0x1ee xul!mozilla::EventListenerManager::HandleEventInternal + 0x4e6 xul!mozilla::EventListenerManager::HandleEvent + 0x8d xul!mozilla::EventTargetChainItem::HandleEvent + 0x29c xul!mozilla::EventTargetChainItem::HandleEventTargetChain + 0x485 xul!mozilla::EventDispatcher::Dispatch + 0xfe5 xul!mozilla::EventDispatcher::DispatchDOMEvent + 0xf7 xul!mozilla::DOMEventTargetHelper::DispatchEvent + 0x45 xul!mozilla::dom::EventTarget::DispatchEvent + 0x34 xul!mozilla::dom::MessageEventRunnable::DispatchDOMEvent + 0x4b2 xul!mozilla::dom::MessageEventRunnable::WorkerRun + 0x74 xul!mozilla::dom::WorkerRunnable::Run + 0x2b9 xul!nsThread::ProcessNextEvent + 0x569 xul!NS_ProcessNextEvent + 0x4a xul!mozilla::dom::WorkerPrivate::DoRunLoop + 0x349 xul!mozilla::dom::workerinternals::`anonymous namespace'::WorkerThreadPrimaryRunnable::Run + 0x4d4 xul!nsThread::ProcessNextEvent + 0x569 xul!NS_ProcessNextEvent + 0x4a xul!mozilla::ipc::MessagePumpForNonMainThreads::Run + 0x96 xul!MessageLoop::AutoRunState::~AutoRunState + 0xf xul!MessageLoop::Run + 0x84 xul!nsThread::ThreadFunc + 0x121 nss3!_PR_NativeRunThread + 0x13a nss3!pr_root + 0xa ucrtbase!thread_start<unsigned int (__cdecl*)(void *),1> + 0x42 KERNEL32!BaseThreadInitThunk + 0x14 mozglue!mozilla::interceptor::FuncHook<mozilla::interceptor::WindowsDllInterceptor<mozilla::interceptor::VMSharingPolicyShared>,void (*)(int, void *, void *)>::operator() + 0xe mozglue!patched_BaseThreadInitThunk + 0x6e ntdll!RtlUserThreadStart + 0x21 ``` After Rob's comment I installed uBlock origin and launched Tor Browser on a debugger (as I already had the needed symbols), and I detected a crash (stack trace attached). As regards the testcase, why is https://boring-easley-d4cbde.netlify.app/ not okay? Is it because it has been created with react, or because it uses openpgp.js, or something else? Just to understand how I could improve it. Tor Browser has patches on top of Firefox, but none in this part of code. The patch for Bug 1724777 was the last one that modified `xpcom/base/CycleCollectedJSContext.cpp`. But I can build Firefox before any of our patches with and without the patch for Bug 1724777. (ugh, sorry for the double attachment, I had an alert with error from S3 and I thought it was not added).