Okay, I found a good add-on to Mozilla Firefox, so that you can disable some scripts on webpages, which can prevent pop-ups, and spyware a that kind of crap. It is also good to use if you put in a bad code on your SMF forum, and for some reason you cannot access the forum or something like that.
Its Called "NoScript", and its free, and PERFECTLY safe for your computer, it was designed to keep out viruses, so dont worry about
it containing any!

You can find more info on this,
Here.
Hopefully someone else will find this useful!
