Is Firefox Exploiting Volunteers?

It seems that the web browser FireFox is making millions of dollars off of the Google search box in their browser. Personally I am not against a company making money from paid searches but when that company’s product is developed from a host of volunteer work, I have to question that companies ethics.

An article by Antone Gonsalves goes into more detail on how Mozilla is earning these millions. I wonder if all of these volunteers would be so giving of themselves and their time if they knew that their efforts were generating huge amounts of revenue for Mozilla.

Does Mozzila offer them any form of compensation? Does Mozilla make any contributions to charitable organizations? Does Mozilla spend any of that money in an effort to standardize web browser technology? I sincerely doubt it.