Your System Details shows Windows 7 Firefox 23.0 Shockwave Flash 16.0 r0 ------------------ https://support.mozilla.org/en-US/kb/update-firefox-latest-version '''41.*''' ----------------- Security Issue: Update your Flash Player '''Version 19.0.0.185<br>https://www.adobe.com/products/flashplayer/distribution3.html''' '''Note: Windows users''' must download the “Internet Explorer” '''and''' “Plugin-based browsers” installers. Note: Edge on Win10 does not use ActiveX version but its own Flash. See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

You can check for problems with current Shockwave Flash plugin versions and try this: *make sure you have the latest Flash version:<br>http://www.adobe.com/special/products/flashplayer/fp_distribution3.html *check for updates for your graphics drive drivers<br>https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration *disable protected mode in the Flash plugin (Windows Vista and later)<br>https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox *disable hardware acceleration in the Flash plugin<br>https://helpx.adobe.com/flash-player/kb/video-playback-issues.html *disable hardware acceleration in Firefox<br />https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration See also: *http://kb.mozillazine.org/Flash#Troubleshooting