All three crash reports that you posted are different and I don't know what is causing them. Try to disable the JIT compiler and set some jit prefs (Filter: jit) to false on the <b>about:config</b> to see if that helps. * javascript.options.methodjit.chrome * javascript.options.methodjit.content *http://kb.mozillazine.org/about:config ---- See also: *http://kb.mozillazine.org/Firefox_crashes *https://support.mozilla.org/kb/Firefox+crashes