Norton Toolbar / IPS & Firefox 3.5.7

I just updated to Norton Internet Security 2010 having read elsewhere that doing so would return the Norton Toolbar to my Firefox browser.  It didn't.

 

IPS 2.0 and Toolbar 4.0 appear among the list of add-ons for my version of Firefox (3.5.7).  The options box is greyed out for both.  No Norton Toolbar appears in the browser; whether IPS is working properly or not, I do not know.

 

My Internet Security is 17.1.0.19.

 

Are these products incompatible with Firefox 3.5.7? What can be done, if anything, to resolve this?

 

Thank you.