Version 65.0, first offered to Release channel users on January 29, 2019
We'd like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!
Improved performance: Scrolling is faster and more responsive.
Improved performance and web compatibility, with support for the WebP image format: WebP brings the same image quality as existing formats at smaller file sizes, which saves bandwidth and speeds up page load.
Enhanced security for macOS, Linux, and Android users via stronger stack smashing protection which is now enabled by default for all platforms. "Stack smashing" is a common security attack in which malicious actors corrupt or take control of a vulnerable program.