Firefox 48.0.2 Jun 2026

To enhance security, Firefox 48 made add-on signing mandatory. This prevented the installation of unverified extensions, protecting users from malicious software that could hijack browser settings.

Firefox 48 marked the final version supported for users on OS X 10.6 (Snow Leopard), 10.7 (Lion), and 10.8 (Mountain Lion). Why People Still Search for Firefox 48.0.2 firefox 48.0.2

This era saw the first major integration of components written in Rust , a memory-safe programming language developed by Mozilla to eliminate long-standing security vulnerabilities. To enhance security, Firefox 48 made add-on signing

Updates that make reading easier on both the eyes and ears. To enhance security

New context menu controls for HTML5 audio and video, including looping and playback speed (1.25x).