diff --git a/mobile/app/mobile.js b/mobile/app/mobile.js
index d137b469376..63f091e90f4 100644
--- a/mobile/app/mobile.js
+++ b/mobile/app/mobile.js
@@ -346,7 +346,7 @@ pref("content.sink.perf_deflect_count", 1000000);
 pref("content.sink.perf_parse_time", 50000000);
 
 pref("javascript.options.mem.gc_frequency", 300);
-pref("javascript.options.methodjit.chrome", true);
+pref("javascript.options.methodjit.chrome", false);
 
 pref("dom.max_chrome_script_run_time", 0); // disable slow script dialog for chrome
 pref("dom.max_script_run_time", 20);