Mozilla today launched Firefox 74 for Windows, Mac, and Linux. Firefox 74 includes stricter rules for add-ons, TLS 1.0 and TLS 1.1 disabled by default, and a handful of developer features.
You can download Firefox 74 for desktop now from Firefox.com, and all existing users should be able to upgrade to it automatically. According to Mozilla, Firefox has about 250 million active users, making it a major platform for web developers to consider.