Hi there. Thanks so much for helping us out with mozilla.org! There are a few things you should know. Most of the things are in the bedrock docs. These docs have a lot of information about how to get your local environment setup for development, as well as how to format your code and commit messages. Following these guidelines will very much increase the chances of a pleasant code-review experience.
On May 15th, 2013 we updated the site to the latest Playdoh. This is a large change, so your local environment will need some updating, and if you submitted a pull-request prior to the merge it will need a rebase. Please check the bedrock docs for details.