Comment 1 for bug 62698

You should be using the 64bit version of the pkg, which IS available:
firefox_1.99+2.0b2+dfsg-1ubuntu2_amd64.deb

The 32bit package is built for 32bit edgy, and expects libraries found on that particular arch. While work-arounds may work, I don't see this as a problem with the firefox deb pkg.

Is there a reason why you need 32bit firefox instead of the 64bit firefox? Maybe you could target the bug in a manner more specific to your problem.