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 Wednesday, May 15th we'll be merging a very large refactoring of the codebase (PR #755). Any pull-requests not merged by that point will need a major rebase, and we won't be merging anything for the day preceeding this work and until we push it live.