getfirebug.com has Firebug 1.13 alpha 5
Firebug 1.13a5 fixes 9 issues
Firebug 1.13a5 is compatible with Firefox 25-28
This version doesn’t introduce any new features. The entire team is now focusing and hardworking on adopting the new debugging API that shall represent the heart of the debugger in Firebug.next. This work will be also included in alpha releases soon.
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Jan ‘Honza’ Odvarko