Mozilla

Mozilla makes Firefox and a set of related privacy products, including Thunderbird for email, calendars and contacts, Mozilla VPN for private browsing, Mozilla Monitor for personal data breach alerts, Firefox Relay for masking an email address or phone number, and developer tools such as MDN Plus, Solo, 0DIN and Tabstack. Its Mozilla Foundation arm funds advocacy, education and community-centered technology work, positioning its products as an alternative to services it describes as privacy-invading.

Advertising runs across Firefox and MDN Web Docs, reaching over 210 million monthly active Firefox users and 16.2 million monthly active MDN users, in what Mozilla calls a brand-safe environment for advertisers.