SpywareInfo also recommends Mozilla
For those of you that have never used Mozilla and are still using that Microsoft browser that comes bundled with every copy of Windows, you really are missing out. The tabbed interface by itself makes it worth switching. I can't imagine why Microsoft hasn't put tabs on Internet Explorer already and the lack of them is why I finally stopped using it altogether.
Mozilla is also completely immune to the exploits that script kiddies use to install browser hijackers into Internet Explorer.