It owns two taxable for-profit subsidiaries : the Mozilla Corporation , which employs several Mozilla developers and sets releases of the Mozilla Firefox web browser , and Mozilla Messaging , Inc. , which creates the Mozilla Thunderbird email client . The Mozilla Foundation is based in Mountain View , California , USA . On August 3 , 2005 , the Mozilla Foundation launched a wholly owned subsidiary called the Mozilla Corporation to continue the development and delivery of Mozilla Firefox and Mozilla Thunderbird .