Just as a friendly FYI, Firestone does not make Bridgestone. Bridgestone OWNS Firestone. That is not to say that I am in support of Firestones tires, but do not condem the Japanese owner for making bad tires as well.
The process of overseas tire companies buying up American tire companies has been going on for the past decade. Michelin (France) bought Uniroyal-Goodrich, Pirelli (Italy) bought Armstrong, Continental (Germany) bought General, and the list goes on. The USA has a huge market for tires, and it's cheaper for the overseas companies to buy American manufacturers to market their product.
Just my $. 02, and I am in no way affiliated with anyone or being paid to voice my opinion.
By the way, nobody mentioned Kelly-Springfield. They are the oldest USA tire manufacturer, a sister company of GoodYear, and I feel they make a great tire in their Safari line (AWR or MSR). Check them out!