The release, launched on February 9, 2021, was a minor update specifically focused on stability and fixing a critical startup deadlock issue (bug 1679933). As a "Quantum" version, it continued to utilize the high-speed Rust-based engine designed for performance and efficient memory management. Key Features of the Firefox 85 Series
While Mozilla prioritizes the latest version (currently 150.0), you can still find older versions: The release, launched on February 9, 2021, was
Install an older version of Firefox | Firefox Help - Mozilla Support launched on February 9
: A major privacy feature that isolates "supercookies" to prevent trackers from following you from one site to another. The release, launched on February 9, 2021, was