Recent answers to Firefox not responding I've refreshed firefox didnt work and started firefox in safemode got a unresponsive plugin window.https://support.mozilla.org/en-US/questions/10858092015-09-27T12:57:29-07:00check this:
see if there are updates for your graphics drive drivers
https://support.mozilla.org2015-09-27T12:57:29-07:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1085809#answer-786985<p>check this:
</p>
<ul><li> see if there are updates for your graphics drive drivers
</li></ul>
<p><strong><a href="https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration" rel="nofollow">https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration</a></strong>
</p>
<ul><li> disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)
</li></ul>
<p><strong><a href="https://forums.adobe.com/message/4468493#TemporaryWorkaround" rel="nofollow">https://forums.adobe.com/message/4468493#TemporaryWorkaround</a></strong>
</p>
<ul><li> disable hardware acceleration in the Flash plugin
</li></ul>
<p><strong><a href="https://forums.adobe.com/thread/891337" rel="nofollow">https://forums.adobe.com/thread/891337</a></strong>
See also:
</p>
<ul><li> <strong><a href="http://kb.mozillazine.org/Flash#Troubleshooting" rel="nofollow">http://kb.mozillazine.org/Flash#Troubleshooting</a></strong>
</li></ul>
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<p>Issues have been previously linked to the McAfee Site Advisor extension.
Try to disable it and see if the problem persists.
</p><p><a href="http://service.mcafee.com/faqdocument.aspx?id=TS100162" rel="nofollow">http://service.mcafee.com/faqdocument.aspx?id=TS100162</a>
How to uninstall SiteAdvisor
</p><p>To disable it:
Type "about:addons" in the Location bar
Find the extension and click on its "Disable" button
</p>