Firefox 88 has been released. New
features include support for PDF forms with embedded JavaScript and smooth
pinch-zooming using a touchpad, and better protection against cross-site
privacy leaks. See this
article for more information on how Firefox 88 combats window.name
privacy abuses.

Firefox 78.10 ESR contains
various fixes for stability, functionality, and security.

Source: LWN.net – Firefox 88.0 and 78.10 ESR