The most severe one, CVE-2020-16042, is caused by a bug that would have allowed operations on a BigInt to potentially exposed uninitialized memory. With the release of Firefox 84, Mozilla has also addressed multiple security vulnerabilities with severity ratings ranging from low to critical. Fixes critical and high severity vulnerabilities MacOS users running Cylance anti-malware on their systems might also get their Firefox installation corrupted after the antivirus software erroneously flags it as malware. Mozilla has shared info on how to fix this known issue by installing Rosetta on their Apple Silicon Macs (i.e., MacBook Pro, MacBook Air, or Mac mini with Apple M1 chips) as a quick workaround. However, macOS users with Apple Silicon Macs may encounter playback errors when streaming encrypted content on video streaming platforms such as Netflix, Hulu, Disney+, and Amazon's Prime Video if the Rosetta system software is not installed. Starting with Firefox 85.0, the web browser will no longer support Adobe Flash, with no setting available to re-enable it. This version is also the final one to support Adobe Flash. 'WebRender rolls out to MacOS Big Sur and Windows devices with Intel Gen 5 and 6 GPUs,' Mozilla added. 'Additionally, we'll ship an accelerated rendering pipeline for Linux/GNOME/X11 users for the first time, ever!' MacOS users can follow these steps to upgrade to Firefox 84.0 on a new Mac with an Apple Silicon processor.įirefox 84 also adds modern shared memory allocation on Linux devices for better performance and Docker compatibility. 'Native support for macOS devices built with Apple Silicon CPUs brings dramatic performance improvements over the non-native build that was shipped in Firefox 83: Firefox launches over 2.5 times faster and web apps are now twice as responsive (per the SpeedoMeter 2.0 test),' Mozilla says. With the release of Firefox 84, all other Firefox development branches have also moved up a version bringing Firefox Beta to version 85 and the Nightly builds to version 86.īelow you can find the major changes and improvements in Firefox 84 - if you want to read the full release notes, you can do so here. The browser will automatically check for the new update and install it when available. Windows, Mac, and Linux desktop users can upgrade to Firefox 84 by going to Options -> Help -> About Firefox. Mozilla Firefox 84 was released today with a dramatic performance boost after adding native support on macOS devices with Apple Silicon processors.

Firefox for old macs