Adobe Flash Player is a plugin that allows browsers such as Firefox to display Flash media on web pages. Flash is often used for animations, videos and games. This article explains how to install Flash.
When you visit a webpage that uses Flash and the plugin is missing, you will see the message "A plugin is needed to display this content" for parts of the page that require Flash (if at all):
Follow the steps below to install the latest Flash Player plugin.
The latest version of the Flash plugin should perform better and crash less often. To check if Flash is up to date, visit Mozilla's Plugin Check page. If it says that Flash needs to be updated, install the latest version manually using the steps in the section above.
See Flash Plugin - Keep it up to date and troubleshoot problems for steps to troubleshoot the Flash plugin.