Good news Widerbug users!
The dedicated Firebug team has just added the widescreen option that Widerbug enables into the core of Firebug 1.9.0, making Widerbug obsolete. You may uninstall Widerbug and go back to using regular Firebug and be able to change the layout using the option seen below.
This is welcome news to all Widerbug users, I imagine. It’s been difficult to keep up with Firefox’s new fast-track release schedule, as well as continually adapting to the Firebug internal changes. Now you can enjoy widescreen support, with Firebug in one of several locations, without sacrificing new critical updates and feature improvements.