Mozilla Twitter-based Customer Service
You can tweet at Mozilla and their customer support team will respond to you. Other customers like you report to us that this is the best way to contact them for customer service issues.
Or take advantage of GetHuman's tools for getting more attention on your issue faster:Help me with my issue
Mozilla Phone Number
Mozilla doesn't have a phone number, which is a shame.
Mozilla Live Chat
Unfortunately, Mozilla does not offer live chat as a channel for customer service at this time.