In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers/letters, click it and select Submit.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

Signature hang

Process Type plugin Silverlight Plug-In Version: 5.1.40728.0

nvd3dum.dll = NVIDIA Windows Vista WDDM driver

This is for Sumo's Related Bugs 1170231 RESOLVED FIXED Interrupt race resolution may cause deadlocks

1156800 RESOLVED FIXED crash in hang | WaitForMultipleObjectsEx | RealMsgWaitForMultipleObjectsEx | MsgWaitForMultipleObjects | mozilla::ipc::MessageChannel::WaitForInterruptNotify() | mozilla::ipc::MessageChannel::Call(IPC::Message*, IPC::Message*)

Microsoft Silverlight

https://www.microsoft.com/getsilverlight/get-started/install/default.aspx

https://www.microsoft.com/en-us/Search/result.aspx?q=Silverlight

http://social.technet.microsoft.com/wiki/contents/articles/30387.silverlight-troubleshooting-installation.aspx

check this:

• see if there are updates for your graphics drive drivers

https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

• disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

• disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

Note that there is a crash report in the question that shows a problem with the Silverlight plugin

• Firefox 41.0.1 Crash Report [@ hang | WaitForMultipleObjectsEx | RealMsgWaitForMultipleObjectsEx | MsgWaitForMultipleObjects | mozilla::ipc::MessageChannel::WaitForInterruptNotify() | mozilla::ipc::MessageChannel::Call(IPC::Message*, IPC::Message*) ]
• Process Type plugin Silverlight Plug-In Version: 5.1.40728.0 Filename: npctrl.dll

Your System Details List shows multiple Flash plugins.

• Shockwave Flash 18.0 r0
• Shockwave Flash 19.0 r0

You can find the installation path of all plugins on the about:plugins page.

• http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins

You can check the Flash player installation folder for multiple Flash player plugins and remove older version(s) of the plugin (NPSWF32) and possibly (re)install the latest Flash player.

• (32 bit Windows) C:\Windows\System32\Macromed\Flash\
• (64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\