title: Firefox does not find Flash Player Plugin on Centos / Linux
body: <p>In our production environment we are installing a Web-based product. The Operating System is Centos 6.5.  For this product, we have installed Firefox-33 and Flash Player 11.2.202.406-release.x86_64.  The problem is that Firefox starts, but it does not detect Flash Player Plugin.</p>
  
  <p>The following error message is reported when we run Firefox:</p>
  
  <p>1411663263429   addons.manager  ERROR   Exception calling provider startup: [Exception... "Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [mozIGeckoMediaPluginService.addPluginDirectory]"  nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"  location: "JS frame :: resource://gre/modules/addons/OpenH264Provider.jsm :: OpenH264Provider.startup :: line 271"  data: no] Stack trace: OpenH264Provider.startup()@resource://gre/modules/addons/OpenH264Provider.jsm:271 &lt; AMI_callProviders()@resource://gre/modules/AddonManager.jsm:875 &lt; AMI_startup()@resource://gre/modules/AddonManager.jsm:750 &lt; AMP_startup()@resource://gre/modules/AddonManager.jsm:2322 &lt; AMC_observe()@resource://gre/components/addonManager.js:55 &lt; </p>
  
  <p>Questions are:</p>
  
  <ol>
  <li>Why is Firefox not detecting or connecting to Flash Player Plugin?</li>
  <li>Is Gecko Media Plugin not functioning, or not able to detect Flash Player?</li>
  <li>What steps should we take so that Firefox can detect the Flash Player Plugin ?</li>
  </ol>
  
  <p>We would really appreciate any help in this regard.  In case this is not the right (sub)-forum, please advise where we should post this question.</p>
  
  <p>Our past searches found some links like below, which did not help or cover this specific query:</p>
  
  <p><a href="https://stackoverflow.com/questions/20447297/flash-player-does-not-show-up-on-firefox-but-not-chromium">Flash Player Does not Show up on Firefox but not Chromium</a></p>
  
  <p><a href="https://stackoverflow.com/search?q=firefox+on+centos+flash+plugin+">https://stackoverflow.com/search?q=firefox+on+centos+flash+plugin+</a></p>
  
  <p><a href="http://www.niharsworld.com/2012/06/15/solved-adobe-flash-player-plugin-working-firefox-13-white-screen-visible-video/" rel="nofollow noreferrer">http://www.niharsworld.com/2012/06/15/solved-adobe-flash-player-plugin-working-firefox-13-white-screen-visible-video/</a></p>
  
  <p><a href="https://stackoverflow.com/questions/13800544/play-streaming-videos-on-firefox-with-html5-or-flash">Play streaming videos on firefox with html5 or flash</a></p>