Mozilla released today Firefox 63. The installer is already replicating on official servers but you can download it now from our software hub. The main new feature in Mozilla Firefox 63 is content blocking. Users can block third-party tracking cookies or block all trackers.
Mozilla Firefox 63 is packed with few new features. The most exciting one is the possibility to block content. With 63 you can block all trackers, or third-party tracking cookies and create exceptions for trusted sites that don’t work correctly with content blocking enabled. Linux users will be happy about moving WebExtensions to own process. Firefox from version 63 warns about having multiple windows and tabs open when quitting from the main menu, and resolved an issue that prevented the address bar from auto filling bookmarked URLs in certain cases.
Mac users will also find some notable changes in Firefox 63 including faster tab switching in the majority of cases, and improved reactivity of the browser. From now one on macOS, WebGL power preferences allow non-performance-critical applications and applets to request the low-power GPU instead of the high-power GPU in multi-GPU systems. In the Library, the Open in Sidebar feature for individual bookmarks was removed.
In Windows 10 the Firefox theme matches now your OS Dark or Light mode. The build infrastructure of Firefox 63 on Windows moved to the Clang tool chain, bringing important performance gains. The option to Never check for updates was removed from about:preferences. You can use the DisableAppUpdate enterprise policy as a substitute, and the Ctrl + Tab shortcut displays thumbnail previews of tabs and cycles through tabs in recently used order.