--- seamonkey-2.53.2/mozilla/modules/libpref/init/all.js.orig	2020-05-18 17:45:56.865059662 +0300
+++ seamonkey-2.53.2/mozilla/modules/libpref/init/all.js	2020-05-18 17:46:20.138117306 +0300
@@ -1426,7 +1426,7 @@
 pref("javascript.options.strict.debug",     false);
 #endif
 pref("javascript.options.unboxed_objects",  false);
-pref("javascript.options.baselinejit",      true);
+pref("javascript.options.baselinejit",      false);
 pref("javascript.options.ion",              true);
 pref("javascript.options.asmjs",            true);
 pref("javascript.options.wasm",             true);