Firebug is gradually being phased out in favor of built-in developer tools (which is nice, because Firebug is one of the things making Firefox slow). There's be

Firebug is gradually being phased out in favor of built-in developer tools (which is nice, because Firebug is one of the things making Firefox slow). There's been lots of blogging about those lately, just check out a Nightly/Aurora Firefox build.