console.dir(object) – Prints an interactive listing of all properties of the object. So, now you won’t have to find the code block and specify a breakpoint everytime you debug.
var template = processTemplate(templ);
var result = applyTemplate(template, data);
console.profile([title]) & console.profileEnd() – The profile view of the console tab in Firebug can sometimes be too overwhelming. In those cases, using this function pair will help narrow down your scope of search.
There are a bunch of other functions on the console object too and you should check it out. You never know when some of those functions could save your computer from having to listen to all those obscenties that you yell at it.