How To Contact Firestone Headquarters To Place A Complaint?

Firestone's Corporate Office is in Japan, which is included at the bottom of this answer. However, they do have contact information for here in the States, if interested:

Direct line to a customer service rep: 800-367-3872

Hours of Operation: Mon-Fri: 7am-7pm CST

Email: Submit Email to Customer Service

Website: http://www.firestonecompleteautocare.com/

I know you requested contact info higher up the ladder than Customer Service, and this is the current information I have for Corporate:

• Corporate Office
• 10-1, Kyobashi 1-Chome
• Tokyo, 104-8340
• Japan 

Phone: +81 3-3567-0111
Fax: +81 3-3535-2553

Please Note: I believe any fax sent from here can be in English. However, I do not know if Corporate is able to accomodate the same over the telephone.

Hope this helps