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Youtube videos not playing in Firefox 4.0.1.When I checked control player am using adobe flash player 11.4.402.287.

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YouTube videos not playing in Firefox 4.0.1.When I checked control player am using adobe flash player 11.4.402.287

Additional System Details

Sites Affected

http://

Installed Plug-ins

  • IE Tab Plug-in for Mozilla/Firefox
  • Version 3.9.1.9832
  • Google Talk Plugin Video Accelerator version:0.1.44.23
  • Office Plugin for Netscape Navigator
  • Coupons, Inc. Coupon Printer Plugin
  • Winamp Application Detector
  • RealPlayer Download Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealJukebox Netscape Plugin
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • Google Update
  • Shockwave Flash 11.4 r402
  • iTunes Detector Plug-in
  • CANON iMAGE GATEWAY Mycamera Plugin
  • Picasa plugin
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 10.7.2 for Mozilla browsers
  • McAfee MSC FF plugin DLL
  • SiteAdvisor
  • Yahoo Application State Plugin version 1.0.0.7
  • 4.1.10329.0
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • NPWLPG
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

More Information

cor-el
  • Top 10 Contributor
  • Moderator
10751 solutions 96758 answers

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do not click the Reset button on the Safe mode start window or otherwise make changes.

You can check for problems caused by recent Flash updates and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in Flash 11.3 and later
  • disable hardware acceleration in the Flash plugin