You need to install flash plugin to view animation video play games.

Installing Flash using the Plugin Finder Service

Go to a page that uses Flash such as Adobe's test page.A yellow notification bar will appear above the webpage. Click Install Missing Plugins. The Plugin Finder Service window will appear. Select the most recent version of Flash listed, then click Next. Click the radio button next to I agree and then clickNext.In the Flash installer window, click the check box next to I have read and agree to the terms of the license agreement and then click the Install button that will become activated, to begin the installation.If Windows asks to allow Adobe Flash Player to make changes to your computer, click Yes.When the installation is done, click Finish. The page will reload and you should have Flash installed.

Installing the Flash plugin manually

Go to the Flash Player download page at Adobe.comand download the Flash installer.Caution: Adobe's download page may include a checkbox for optional software (such as Google Chrome or McAfee Security Scan) that is selected by default. If you do not clear the checkbox before downloading, that software will be installed on your computer when you open the Flash installer.When the download has finished, close Firefox. At the top of the Firefox window, click on the Firefoxbutton and then select ExitOpen the Flash installer file you downloaded and follow the instructions.Note: If you are having problems with the Flash installer from Adobe's download page, you can download the full Flash Player installer directly from Adobe.com.

Keeping Flash up-to-date

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.

Troubleshooting the Flash plugin

See Flash Plugin - Keep it up to date and troubleshoot problems for steps to troubleshoot the Flash plugin.Share this article: http://mzl.la/KWPHE0

This article might explain https://support.mozilla.org/en-US/kb/why-cant-firefox-mobile-play-flash-on-my-device

Tegra 2 Galaxy Grand Duos i9082Galaxy S 4 i9500Galaxy s2 Htc Desire Z and others If ur using this devices support to this will be added

Adobe does not really support Android (and Playbook) anymore as they stopped with 11.1 version sometime ago.

mohammed.samad your first post was for desktop Firefox and your second post does not make sense as Mozilla is not likely to do anything in making Flash work in mobile Firefox on devices that it currently does not work on properly or at all.