Open the crash report on crash-stats: 7b7af02c-3a7a-426d-9920-370090260818.

The crash signature is mozilla::dom::Selection::SelectFrames.

Frame Signature Source Changesets
0 mozilla::dom::Selection::SelectFrames(nsPresContext*, mozilla::dom::AbstractRange&, bool) const dom/base/Selection.cpp:1992
0
2026-08-18
backout: False
1 nsWindowRoot::PreHandleEvent(mozilla::EventChainVisitor&) dom/base/nsWindowRoot.cpp:153
2 mozilla::EventDispatcher::Dispatch(mozilla::dom::EventTarget*, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsEventStatus*, mozilla::EventDispatchingCallback*, nsTArray<mozilla::dom::EventTarget *>*) dom/events/EventDispatcher.cpp:1298
3 FocusBlurEvent::Run() dom/base/nsFocusManager.cpp:2972
4 nsContentUtils::AddScriptRunner(already_AddRefed<nsIRunnable>) dom/base/nsContentUtils.cpp:7823
0
2026-08-18
backout: False
0
2026-08-17
backout: False
5 nsFocusManager::FireFocusOrBlurEvent(mozilla::EventMessage, mozilla::PresShell*, mozilla::dom::EventTarget*, bool, bool, mozilla::dom::EventTarget*) dom/base/nsFocusManager.cpp:3113
6 nsFocusManager::SendFocusOrBlurEvent(mozilla::EventMessage, mozilla::PresShell*, mozilla::dom::Document*, mozilla::dom::EventTarget*, bool, bool, mozilla::dom::EventTarget*) dom/base/nsFocusManager.cpp:3084
7 nsFocusManager::BlurImpl(mozilla::dom::BrowsingContext*, mozilla::dom::BrowsingContext*, bool, bool, bool, mozilla::dom::Element*, unsigned long long) dom/base/nsFocusManager.cpp:2633
8 nsFocusManager::Blur(mozilla::dom::BrowsingContext*, mozilla::dom::BrowsingContext*, bool, bool, bool, unsigned long long, mozilla::dom::Element*) dom/base/nsFocusManager.cpp:2384
9 nsFocusManager::WindowLowered(mozIDOMWindowProxy*, unsigned long long) dom/base/nsFocusManager.cpp:867
10 mozilla::dom::PBrowserChild::OnMessageReceived(IPC::Message const&) ipc/ipdl/PBrowserChild.cpp:4460
11 mozilla::dom::PContentChild::OnMessageReceived(IPC::Message const&) ipc/ipdl/PContentChild.cpp:8165
12 mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::ActorLifecycleProxy*, mozilla::ipc::MessageChannel::MessageTask&) ipc/glue/MessageChannel.cpp:1512
13 mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex &> const&) xpcom/threads/TaskController.cpp:1360
14 NS_ProcessNextEvent(nsIThread*, bool) xpcom/threads/nsThreadUtils.cpp:471
15 mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) ipc/glue/MessagePump.cpp:83
16 MessageLoop::RunHandler() ipc/chromium/src/base/message_loop.cc:364
17 nsBaseAppShell::Run() widget/nsBaseAppShell.cpp:151
18 nsAppShell::Run() widget/windows/nsAppShell.cpp:632
19 mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) ipc/glue/MessagePump.cpp:233
20 MessageLoop::RunHandler() ipc/chromium/src/base/message_loop.cc:364
21 mozilla::BootstrapImpl::XRE_InitChildProcess(int, char**, XREChildData const*) toolkit/xre/Bootstrap.cpp:59
22 wmain(int, wchar_t**) toolkit/xre/nsWindowsWMain.cpp:150
23 __scrt_common_main_seh() /builds/worker/workspace/obj-build/browser/app/D:/a/_work/1/s/src/vctools/crt/vcstartup/src/startup/exe_common.inl:288
24 BaseThreadInitThunk None
25 RtlUserThreadStart None