Comment 4 for bug 524947

I have got some workaround.

You can see from your error log that the cause of this problem start at this line.
"update-alternatives: error: alternative path /usr/bin/firefox doesn't exist."

It tell us that it want "/usr/bin/firefox" which it was disappear.

Then all you have to do is to open terminal and type this command
sudo ln -s /usr/lib/firefox-3.6/firefox /usr/bin/firefox

Then reinstall the packages. It should work with no error.