Any time you want or need to check for upgrades, go to the web site of the True Owner of the program in question. Sometimes the plugin checker has old information.

Mozilla is aware of the current Flash Player 13.0.0.'''302''' ESR. June 30, 2015: https://addons.mozilla.org/firefox/blocked/p928 Flash Player Plugin 13.0.0.269 to 13.0.0.'''295''' Mozilla adds version of Plugins and Extensions to the blocklist when they are of serious security, stability and malware concerns. https://addons.mozilla.org/firefox/blocked/ https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html https://www.adobe.com/products/flashplayer/distribution3.html http://www.adobe.com/software/flash/about/ Make sure Firefox is closed/exited before you uninstall and install the plugin based Flash player on Windows. Note that the current Firefox 31.8.0esr or 31.9.0esr may be the last security update for the old Firefox 31.0 ESR as 38.1.0 ESR is more the primary ESR now. ---- A section for discussing the Plugin check page is at https://support.mozilla.org/en-US/forums/plug-check-page-discussions Note the 13.0.0.'''302''' ESR is actually a recent update from Adobe to address critical vulnerabilities. The previous current 13.0.0.29'''6''' is vulnerable. https://helpx.adobe.com/security/products/flash-player/apsb15-16.html