Crash report: https://crash-stats.mozilla.org/report/index/a3c29db3-f0bb-4188-95c9-1ab1a0201119

MOZ_CRASH Reason: MOZ_CRASH(Shutdown hanging before starting.)

Top 10 frames of crashing thread:

0 ntdll.dll NtWaitForAlertByThreadId 
1 ntdll.dll RtlAcquireSRWLockExclusive 
2 xul.dll std::sys::windows::c::AcquireSRWLockExclusive ../18bf6b4f01a6feaf7259ba7cdae58031af1b7b39//library/std/src/sys/windows/compat.rs:69
3 xul.dll cert_storage::{{impl}}::done<tuple<>, closure-0> security/manager/ssl/cert_storage/src/lib.rs:1132
4 xul.dll moz_task::{{impl}}::allocate::Run xpcom/rust/moz_task/src/lib.rs:212
5 xul.dll mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal xpcom/threads/TaskController.cpp:720
6 xul.dll mozilla::detail::RunnableFunction<`lambda at /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:120:7'>::Run xpcom/threads/nsThreadUtils.h:577
7 xul.dll nsThread::ProcessNextEvent xpcom/threads/nsThread.cpp:1197
8 xul.dll mozilla::ipc::MessagePump::Run ipc/glue/MessagePump.cpp:87
9 xul.dll MessageLoop::RunHandler ipc/chromium/src/base/message_loop.cc:327

these shutdownhangs are starting to show up on 32bit builds on windows in firefox 84

looks like the crashing has improved with 84.0b4 (probably related to the uplift of bug 1677399)

The severity field is not set for this bug.
:keeler, could you have a look please?

For more information, please visit auto_nag documentation.

I think bug 1678762 addressed this.