This version has stopped working on Trunk since the day Aurora 7..0a2
was released. On that day I tried the nightly because I thought I
needed it for the latest memory management fixes. I got the nightly
and it broke Firebug. So I got the Aurora and it was ok. Today I
applied the update for Aurora and it has broken this release.
The primary Firebug UI no longer opens when the status bar icon is
clicked. Menu items in the Tools menu are broken.
So this release got broken by something that was added to the Firefox
trunk/nightlies on or before July the 8th.