How to remove Firefox from update manager?

I uninstalled Firefox some days ago, because I use another browser. It appeared yesterday as an important security update. I can uncheck every package associated with it, and install the remaining updates, but it just keeps showing up, and it's a little annoying.

How can I disable it, so it won't show up again in the update manager, unless I chose to reinstall it?

Thanks.

Looks like you've hit this bug: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/800857

Should be fixed by now.

From the command line CTRL+ALT+T, what does the following buy you?

sudo apt-get install deborphan debfoster 
sudo apt-get remove --purge firefox
sudo apt-get clean

The later will clean the /var directory.

sudo debfoster

The above command will show files and libraries still left after the apt-get remove --purge. If you don't recognize a library, keep it. Later on, deborphan will give you a list of 'orphaned' libraries that are hanging with no use, and are safe to nuke.

If you make a mistake with debfoster, type 'u' and will ask you again if you want to keep it. When you are thru with it, invoke deborphan.

sudo deborphan

The above command will give a list of libraries that are hanging just taking space. To get rid of them, use the following command:

sudo deborphan | xargs apt-get -y remove purge
sudo apt-get clean