Developer Console totally can't use with Firefox 18

[Superdome-old]

When using Firefox 18, users can't open developer console at all.

However, it's ok when using with chrome and IE, and also Firefox 18 safe mode.

Even clear all of historial data and cookies, and disable all of plugins and extensions it is unable to open developer console well.

Firefox 18 can only open developer console by safe mode.

[Thomas Dvornik · Accepted solution]

Looks like it is an issue in the new IonMonjey compiler in FF18 that is surfaced in Ext. 

Here is the Ext issue: http://www.sencha.com/forum/showthread.php?253345-FF-18-problem

Here is the FF bug: https://bugzilla.mozilla.org/show_bug.cgi?id=818023

More information on IonMonkey: https://blog.mozilla.org/javascript/2012/09/12/ionmonkey-in-firefox-18/

As a workaround, looks like you can disable javascript.options.ion.content in your about:config, or open Firebug seems to help.

[Superdome-old]

Yes. when toggle "javascript.options.ion.content" to false, the problem is gone. Not only so, the speed is faster than ever... Cool!!