You probably had Backweb bundled in with some other software you installed, Michelle. If it's in Add / Remove, as Lona suggested, bin it from there, then
update and run Ad Aware and Spybot, and remove any instances they find.
Now, this Spyware Blaster of yours.
I'm not sure if it would detect spyware if it has been installed within other software. I think it may only stop it being downloaded from web pages, but not certain about that. Anyway, have you definitely got the latest version (2.6.1), and have you definitely updated it? After it has loaded the new definitions, you have to press 'Select All', then 'Protect Against Checked Items' to activate the protection for the new definitions. That bit could be missed (especially if you are blonde - heehee), but if you don't do that part, you might as well not have Spyware Blaster at all. Sorry if that's stating the bleeding obvious, but somehow spyware is getting through your defences, so it needs to be established how this is happening. Suggest you have a look at the list in SB, and see if there are any unchecked items (they will be in red).
It could well be that, although Mozilla doesn't block spyware as far as I know, something is being prevented from 'phoning home' when you use Moz, which could be causing it to crash. If you have programs which rely on spyware to work properly, they are not worth having, in my opinion, and you should seek alternatives.
Here endeth this morning's lecture!