I wouldn't use "them" in this sentence, Mozilla is non-profit organization, but Gecko is open source - anyone is free to send them patch. The problem is that de

I wouldn't use "them" in this sentence, Mozilla is non-profit organization, but Gecko is open source - anyone is free to send them patch. The problem is that development in this environment is not an easy task. Yup, it is improving overtime, build scripts are constantly updated, but is still huge codebase with a lot of "magic".