The Firebug team has tests running against Nightly. Bugs are caught and fixed fairly quickly. Because we work to catch bugs during the Nightly phase, there shou

The Firebug team has tests running against Nightly. Bugs are caught and fixed fairly quickly. Because we work to catch bugs during the Nightly phase, there should not be much time during which an Aurora build is not compatible with a pre-release (at least!) Firebug, and that would be soon after Aurora is branched. Given that Nightly is the least stable kind of build and could have other problems along the way, we've reached a pretty good point with Firebug's compatibility. Of course, you also have the Web Console if you're having trouble with Firebug (and I'll grant that this alone is not a replacement for Firebug!) ObDisclaimer: I'm the product manager for devtools at Mozilla.