Lost Norton IPS 2.0 and Norton Toolbar 4.6 addons

Hello;

 

I have Norton Internet Security 2010 (most recent liveupdate was run 2 minutes ago) and Norton Utilities v14.5.0.120 installed on my laptop and I am running Windows 7 32 bit Premium edition. My internet browser is Firefox v3.6.10.

 

Until yesterday I had the Norton IPS 2.0 and Norton Toolbar 4.6 addons installed and working perfectly, but today for some unknown reason these 2 addons are gone (the only thing that I did that I could think of is that I installed the Flashblock addon for Firefox).

 

My question: how can I re-install the Norton IPS 2.0 and Norton Toolbar 4.6 for Firefox?

 

Thanks in advance to those who take the time to respond.

Kind regards,

Tonia