Check your other plugins while you are at it. [https://www.mozilla.org/en-US/plugincheck/]
" Computerworld - Adobe today patched seven critical vulnerabilities in Flash Player -- the fifth security update so far in 2012 -- and released a sandboxed plug-in for Mozilla's Firefox.
The company also released the "silent update" tool for OS X, and said it had prepped Flash for the upcoming OS X 10.8, aka Mountain Lion, by signing its code, a requirement if users are to install software downloaded from sources other than Apple's own Mac App Store... "
June 8, 2012Source: Computerworld
Adobe patches critical Flash bugs, ships sandboxed plug-in for Firefox