diff -up firefox-32.0.1/mozilla-release/modules/libpref/src/init/all.js.old firefox-32.0.1/mozilla-release/modules/libpref/src/init/all.js
--- firefox-32.0.1/mozilla-release/modules/libpref/init/all.js.old	2014-09-12 00:25:45.000000000 +0200
+++ firefox-32.0.1/mozilla-release/modules/libpref/init/all.js	2014-09-16 14:27:52.447743192 +0200
@@ -844,7 +844,7 @@ pref("javascript.options.strict",
 #ifdef DEBUG
 pref("javascript.options.strict.debug",     true);
 #endif
-pref("javascript.options.baselinejit",      true);
+pref("javascript.options.baselinejit",      false);
 pref("javascript.options.ion",              true);
 pref("javascript.options.asmjs",            true);
 pref("javascript.options.native_regexp",    true);