Mozilla is the company behind Firefox and other tools. It is a non-profit organization.
Positions may be regular or contract, depending on company needs. While many jobs list a target location, it appears that they may be willing to accept work at home employees for these positions as well for the right person. Positions may include data analyst, software developer, recruiter, product designer, and more.
Benefits include medical, dental and vision plans, quarterly bonuses, course reimbursements and opportunities for personal development. They have offices but are welcoming of work at home employees.