I like to think I keep up-to-date with what’s happening
but it seems a security update slipped out the door on the
24th without my noticing it. Version 1.0.2
fixes three vulnerabilities, including one that, as the
saying goes, allows the execution of arbitrary code (geek
speak for anyone can run anything on your PC). Note carefully
install instructions say to remove your previous version
of Firefox before installing this one.
There is also an update to the Thunderbird e-mail program
so you may want to update that too.
Release Notes are here.