The Adobe Flash Player browser plugin lets you view video and animated content in Firefox.
This article has information about testing, installing, updating, uninstalling and troubleshooting the Adobe Flash plugin.
There are three different types of Flash Players: an Active X version for Internet Explorer, a Chrome version built-in the browser and a plugin version for Firefox and some other browsers.
If you want Flash to work in Firefox you must install the plugin version, as explained above.
To check if your installation of Flash is up to date, visit Mozilla's Plugin Check page.
See the Adobe Security bulletins and advisories page for information about security and stability issues affecting Adobe Flash Player and other Adobe products.This update comes to you just a week after Adobe Systems released Adobe Flash Player 188.8.131.52 for Mac and Windows with security fixes for critical vulnerabilities, some of which could lead to information disclosure and arbitrary code execution.The Flash plugin automatically updates itself by default.If Mozilla's Plugin Check page or Adobe's test page says that Flash is outdated and you don't want to wait for the automatic update, you can update Flash manually by downloading and installing the latest version from Adobe.
For more information, see the articles Set Adobe Flash to "click to play" on Firefox and Why do I have to click to activate plugins? Apple has just updated the web plug-in blocking mechanism to disable all Flash Player versions prior to Flash Player 184.108.40.206 and 220.127.116.115, due to security issues identified in the older versions.