So the previous post is about how to find about:config. The settings and the gateway to mess up and change Firefox the way you like it. But in this post I would like to show you how to access the stumble settings in Firefox about:config. You can access the stumble settings by typing in the filter stumble. Yes easy as that. All the stumble toolbar settings including your username and all the fine details of how stumbleupon works are located at stumble.(and the setting) Here is a screenshot So you see where the "filter" is. All you do is type stumble there and you are left with the stumble settings. That is the easy way to start hacking Stumbleupon toolbar via Firefox about:config