Version 1.10.0 of the Firebug web development tool has been released.
Information on new features can be found on this
page; they include a new cookie manager, command editor syntax
highlighting, autocompletion, CSS style tracing, and more. "Firebug
doesn’t slow down Firefox start-up time anymore! It’s loaded as soon as the
user actually needs it for the first time. Only the Firebug start-button
and menu is loaded at the start up time."