firefox: "The clearkey plugin has crashed"

firefox 113.0 crashes for me on amd64 with the message above and prints
this to its output when opening a folder full of pictures on
dropbox.com.

[Parent 10375, IPC I/O Parent] WARNING: process 2097 exited on signal 11: file /usr/obj/ports/firefox-113.0/firefox-113.0/ipc/chromium/src/base/process_util_posix.cc:314
[Child 10616, Main Thread] WARNING: JSWindowActorChild::SendRawMessage (Conduits, ConduitClosed) not sent: !CanSend() || !mManager || !mManager->CanSend(): file /usr/obj/ports/firefox-113.0/firefox-113.0/dom/ipc/jsactor/JSWindowActorChild.cpp:57
[Child 10616, Main Thread] WARNING: JSWindowActorChild::SendRawMessage (Conduits, ConduitClosed) not sent: !CanSend() || !mManager || !mManager->CanSend(): file /usr/obj/ports/firefox-113.0/firefox-113.0/dom/ipc/jsactor/JSWindowActorChild.cpp:57
[Child 10616, Main Thread] WARNING: JSWindowActorChild::SendRawMessage (Conduits, ConduitClosed) not sent: !CanSend() || !mManager || !mManager->CanSend(): file /usr/obj/ports/firefox-113.0/firefox-113.0/dom/ipc/jsactor/JSWindowActorChild.cpp:57
[Child 10616, Main Thread] WARNING: JSWindowActorChild::SendRawMessage (Conduits, ConduitClosed) not sent: !CanSend() || !mManager || !mManager->CanSend(): file /usr/obj/ports/firefox-113.0/firefox-113.0/dom/ipc/jsactor/JSWindowActorChild.cpp:57
[Parent 10375, IPC I/O Parent] WARNING: process 94529 exited on signal 11: file /usr/obj/ports/firefox-113.0/firefox-113.0/ipc/chromium/src/base/process_util_posix.cc:314
[Child 10616, Main Thread] WARNING: JSWindowActorChild::SendRawMessage (Conduits, ConduitClosed) not sent: !CanSend() || !mManager || !mManager->CanSend(): file /usr/obj/ports/firefox-113.0/firefox-113.0/dom/ipc/jsactor/JSWindowActorChild.cpp:57
[Child 10616, Main Thread] WARNING: JSWindowActorChild::SendRawMessage (Conduits, ConduitClosed) not sent: !CanSend() || !mManager || !mManager->CanSend(): file /usr/obj/ports/firefox-113.0/firefox-113.0/dom/ipc/jsactor/JSWindowActorChild.cpp:57


Lucikly we get a core:

Core was generated by `plugin-container'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00000080d3eab023 in mozilla::gmp::GMPChild::RecvStartPlugin(nsTString<char16_t> const&) () from /usr/local/lib/firefox/libxul.so.126.0
[Current thread is 1 (process 187142)]
(gdb) bt
#0 0x00000080d3eab023 in mozilla::gmp::GMPChild::RecvStartPlugin(nsTString<char16_t> const&) () from /usr/local/lib/firefox/libxul.so.126.0
#1 0x00000080d7293cee in mozilla::gmp::PGMPChild::OnMessageReceived(IPC::Message const&, mozilla::UniquePtr<IPC::Message, mozilla::DefaultDelete<IPC::Message> >&) () from /usr/local/lib/firefox/libxul.so.126.0
#2 0x00000080d34f3f23 in mozilla::ipc::MessageChannel::DispatchMessage(mozilla::ipc::ActorLifecycleProxy*, mozilla::UniquePtr<IPC::Message, mozilla::DefaultDelete<IPC::Message> >) () from /usr/local/lib/firefox/libxul.so.126.0
#3 0x00000080d34f4977 in mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::ActorLifecycleProxy*, mozilla::ipc::MessageChannel::MessageTask&) ()
from /usr/local/lib/firefox/libxul.so.126.0
#4 0x00000080d26228a5 in mozilla::ipc::MessageChannel::MessageTask::Run() () from /usr/local/lib/firefox/libxul.so.126.0
#5 0x00000080d65c2eb6 in MessageLoop::DeferOrRunPendingTask(MessageLoop::PendingTask&&) () from /usr/local/lib/firefox/libxul.so.126.0
#6 0x00000080d65c30fc in MessageLoop::DoWork() () from /usr/local/lib/firefox/libxul.so.126.0
#7 0x00000080d65c383b in base::MessagePumpDefault::Run(base::MessagePump::Delegate*) () from /usr/local/lib/firefox/libxul.so.126.0
#8 0x00000080d2efe50b in MessageLoop::Run() () from /usr/local/lib/firefox/libxul.so.126.0
#9 0x00000080d304abd6 in XRE_InitChildProcess(int, char**, XREChildData const*) () from /usr/local/lib/firefox/libxul.so.126.0
#10 0x0000007e1f336336 in main ()
(gdb)

Thanks
Greg