I trust IceCat by the GNU people: http://www.gnu.org/software/gnuzilla/ http://www.gnu.org/software/gnuzilla/ "Its main advantage is an ethical one: it is ent

I trust IceCat by the GNU people: http://www.gnu.org/software/gnuzilla/ http://www.gnu.org/software/gnuzilla/ "Its main advantage is an ethical one: it is entirely free software. While the Firefox source code from the Mozilla project is free software, they distribute and recommend non-free software as plug-ins and addons."