Firefox 48 Release: Find out what is new Firefox 48 Stable will be released on August 2, 2016 according to the Firefox release schedule. Firefox 48 is a major release that makes add-on signing mandatory on Stable and Beta versions of the browser, and introduces multi-process functionality to the first batch of users (who don't run any add-ons). For more info go here http://www.ghacks.net/2016/08/01/firefox-48-release/