getfirebug.com has Firebug 1.10a3
Firebug 1.10a3 is compatible with Firefox 12.
Firebug 1.10a3 fixes 16 issues.
This release improves the multi-line command line (available in the Console panel), which is now supporting color syntax. See the following screenshot.
Firebug extension developers might be also interested how to implement bootstrapped Firebug extensions.
Please post feedback in the newsgroup, thanks.
Jan ‘Honza’ Odvarko