I’ve just updated Widerbug to 1.5.0, once again up to date with the enhancements from Firebug 1.5.0. If you’re running Widerbug 1.3.3 or later, you should receive 1.5.0 via an automatic update. Or, head over to the Widerbug download page to install it.
I know at some point I should attempt to merge my changes into the Firebug codebase and submit a patch (and stop this Firebug cat-and-mouse game), but my XUL knowledge is still fairly limited. If anyone would like to take on the challenge, though, I imagine your patch would be a welcome addition to Firebug’s core!