If you are a Selenium power user or a beginner to Selenium and want to help out, we need you! Come fork our AMO Tests GitHub repository and start extending our coverage. Your tests will need to follow our StyleGuide for how a test should look when you do your pull requests.
How should you do pull requests? Well, we have that covered in a wiki here.
Note that the times of the event are in PST but as you can see if covers quite a lot of the day.