This is a step by step explanation on how to create your Mozilla Rep Profile.
You can find an explanatory video here: https://vimeo.com/37767162
Website Profile Creation
To create your profile, just go to https://reps.mozilla.org and log in with your bugzilla email using Persona (also known as "Browser ID"). You can watch this tutorial video that guide you through the easy steps: http://vimeo.com/mozillareps/remo-profile
Also you can check out an explanatory video for creating and uploading your profile pic in libravatar.org: https://vimeo.com/41234165