If you’re a web dev and interested in contributing to the AMO codebase, here is where you can get onboarded. Once onboarded, select a “goodfirstbug” to work on. These were selected as good introductory bugs to work on, and are mentored by a more experienced Mozillian.
If you’re interested in how we curate the “goodfirstbugs” list, here are the triage meeting notes from yesterday. This was the last one for 2015, but we’ll meet again the first week of January!