Adobe Flash

Installation
There are several solutions to using Adobe Flash on Gentoo based systems. Some work in all browsers, while others only work in a select few. Following the Gentoo philosophy, choose the version that works best.

www-plugins/adobe-flash
The package is the official Linux implementation of Adobe Flash. Adobe has dropped support for any versions newer than 11.2 so this package may work for certain needs but is likely to be old, buggy, and contain many security vulnerabilities. Its use is not recommended.

To use this solution, run the following:

After emerging start or (restart if it was running) Firefox. An old, buggy, insecure version of Adobe Flash should now be available for use.

www-client/google-chrome-beta
Google Chrome includes the Pepper-based Flash plug-in which is much more up-to-date. Simply emerge to use flash in Chrome:

This will not setup flash for use for browsers outside of Chrome, but a Chrome plugin can be used to enabled Flash on Firefox. This is done with the freshflashplayer plugin (see the section below).

www-plugins/freshplayerplugin
The freshplayerplugin is a PPAPI-host NPAPI-plugin adapter for flashplayer in APAPI-based browsers. First

Next, open the Chrome browser at least one time. After Chrome opens install the package:

Then and start (or restart if it was already running) Firefox. A more recent version of Flash should now be available for use in Firefox.