Hi everyone I can also reproduce this bug when starting icedove with a fresh profile and all plugins disabled.
If I open the config editor and click away the "be careful" warning, I get a SIGSEGV with this backtrace: -------------------------- Thread 1 "icedove" received signal SIGSEGV, Segmentation fault. 0x00007ffff3e007a1 in js::jit::SnapshotIterator::numAllocations (this=0x7fffffff8cc0) at ./mozilla/js/src/jit/JitFrames.cpp:2159 2159 ./mozilla/js/src/jit/JitFrames.cpp: Datei oder Verzeichnis nicht gefunden. (gdb) bt #0 0x00007ffff3e007a1 in js::jit::SnapshotIterator::numAllocations (this=0x7fffffff8cc0) at ./mozilla/js/src/jit/JitFrames.cpp:2159 #1 js::jit::IonFrameStackDepthOp::IonFrameStackDepthOp (frame=..., this=<optimized out>) at ./mozilla/js/src/jit/JitFrames.cpp:421 #2 js::jit::TryNoteIterIon::TryNoteIterIon (frame=..., cx=0x7fffc3aed800, this=0x7fffffff8c80) at ./mozilla/js/src/jit/JitFrames.cpp:431 #3 js::jit::HandleExceptionIon (overrecursed=0x7fffffff8b6f, rfe=0x7fffffff9120, frame=..., cx=0x7fffc3aed800) at ./mozilla/js/src/jit/JitFrames.cpp:478 #4 js::jit::HandleException (rfe=0x7fffffff9120) at ./mozilla/js/src/jit/JitFrames.cpp:853 -------------------------- Best Michael