It isn't that we don't recommend it, simply that it isn't in the anti-spyware category but a single purpose tool, I have a copy on my system but I have never had to use it (so it is well out of date), using Firefox you are also les vulnerable to the CoolWebSearch hijacking.
There is a list on the left and you shouldn't need anything other than the Protection on highlighted. The four buttons on that just show current status and what is blocked/protected against. The Status is the most important it tells you if any items have protection disabled and how many items are in the databased (being protected against).
Also on that view, there is Download Latest Protection Updates, this will get any updates if available, on completion of the download you enable/apply the protection and it is done. Forget about it until the next time you check for updates.