Crash signature first observed after the major WebRTC update in bug 1654112 (Firefox 96) but the issue got more frequent with Firefox 97: 44 crashes so far for it which is more than for version 96 over its whole release cycle. All crashes on Windows, many crash stacks indicate the desktop was supposed to be captured.

Crash report: https://crash-stats.mozilla.org/report/index/44f4400f-29b7-495d-82d6-247e90220212

Reason: EXCEPTION_BREAKPOINT

Top 10 frames of crashing thread:

0 kernelbase.dll kernelbase.dll@0x00000000000c0192 
1 xul.dll rtc::webrtc_checks_impl::FatalLog third_party/libwebrtc/rtc_base/checks.cc:162
2 xul.dll webrtc::AlignedMalloc third_party/libwebrtc/rtc_base/memory/aligned_malloc.cc:83
3 xul.dll static webrtc::I420Buffer::Create third_party/libwebrtc/api/video/i420_buffer.cc:72
4 xul.dll webrtc::DesktopCaptureImpl::IncomingFrame dom/media/systemservices/video_engine/desktop_capture_impl.cc:485
5 xul.dll webrtc::DesktopCaptureImpl::OnCaptureResult dom/media/systemservices/video_engine/desktop_capture_impl.cc:632
6 xul.dll webrtc::DesktopAndCursorComposer::OnCaptureResult third_party/libwebrtc/modules/desktop_capture/desktop_and_cursor_composer.cc:234
7 xul.dll webrtc::WindowCapturerWinGdi::CaptureFrame third_party/libwebrtc/modules/desktop_capture/win/window_capturer_win_gdi.cc:157
8 xul.dll webrtc::DesktopCaptureImpl::process dom/media/systemservices/video_engine/desktop_capture_impl.cc:651
9 xul.dll rtc::PlatformUIThread::Run dom/media/systemservices/video_engine/platform_uithread.cc:89

This is an oom, real crash line is: https://hg.mozilla.org/releases/mozilla-release/file/71dce12fda8b1cf9c396a1900b4edf9844206ea5/third_party/libwebrtc/rtc_base/memory/aligned_malloc.cc#l66.

Closing because no crashes reported for 12 weeks.