Mozilla has officially released Firefox 65 to the Windows, Mac, Linux, and Android release channels. This version comes with enhanced tracking protection, language support, streaming enhancements, WebP image support, and improved performance. Mozilla is now offering MSI installers for Firefox 65 and newer versions. Mozilla has improved the Firefox Task Manager so that it shows the amount of memory being utilized by tabs and extensions. Firefox 65 also allows you to modify the content blocking for specific sites by accessing its Control Center as shown below.
Source: https://www.bleepingcomputer.com/news/software/firefox-65-released-with-updated-content-blocking-msi-installers-and-more/