Firefox 103 fixes a number of security vulnerabilities, including several memory safety flaws.
Two critical Firefox use-after-free zero-day vulnerabilities have been fixed.
Mozilla has added site isolation to Firefox 94 to defend against side-channel attacks such as Spectre and Meltdown.
Firefox 83 includes an option to force HTTPS connections to any site that offers them.
Google and Mozilla have released multiple versions of their web browsers over the past few days to roll back certain features and to fix high-severity vulnerabilities.