Mozilla today launched Firefox 62 for Windows, Mac, Linux, and Android. The release builds on Firefox Quantum, which the company calls “by far the biggest update since Firefox 1.0 in 2004.” Version 62 brings variable fonts, automatic dark theme on macOS, and better scrolling on Android.

Firefox 62 for the desktop is available for download now on, and all existing users should be able to upgrade to it automatically. As always, the Android version is trickling out slowly on Google Play. The latest iOS version is available on Apple’s App Store.

Mozilla has started breaking out user numbers for Firefox, which has about 300 million active users. In other words, it’s a major platform that web developers have to consider.

Windows, Mac, and Linux

Firefox 62 for desktop brings support for Variable Fonts, which makes it possible to create typography with a single font file. Traditionally, font families require a separate font file for each variation. Variable fonts contain additional data, which make it possible to generate different styles of the font on demand.

This isn’t a massive release, but there is one other nice addition worth highlighting. When using macOS 10.14 dark mode, Firefox for macOS will now automatically enable the dark theme.

Here’s the full Firefox 62 for desktop changelog:

  • Firefox Home (the default New Tab) now allows users to display up to 4 rows of top sites, Pocket stories, and highlights.
  • “Reopen in Container” tab menu option appears for users with Containers that lets them choose to reopen a tab in a different container. (Bug 1376119)
  • A preference that…