eBay is mostly ads. I don't have issues when using AdBlock plus. Google Toolbar is actually closing the windows from opening, rather than "blocking" them. AdBlockPlus blocks scripts, such as popup code and harmful junk from a list of websites, from loading at all. The TeaTimer in Spybot only prevents changes to the registry, such as startup items. It's the "Immunize" function in Spybot that's a little more on target; it adds known harmful websites to your Hosts file. For example, if I visited "viruswebsite.com" Spybot adds this entry to visit the "wrong" IP address and not the official website, therefor "protecting" your computer. It's really a halfass way of doing things, especially since multiple programs can write to or overwrite the Hosts file. Also since the Hosts file is really a text file, there is a limit the size of that file, though I'm not sure if Spybot's Immunize function has gotten that many sites listed yet or not... So to answer your question, you're probably better off with AdBlockPlus and removing Google Toolbar, since the Google search engine is already built into Firefox.