Product Firefox Release Channel release Version 51.0.1 Build ID 20170125094131 OS Windows 7 OS Version 6.1.7601 Service Pack 1

Signature: IPCError-browser | ShutDownKill

Attention Sumo's there are 40 related bug reports.

Nvwgf2um.dll = NVIDIA Compatible D3D10 Driver = NVIDIA Corporation

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

You can try to disable multi-process tabs in Firefox.

You can disable multi-process tabs in Firefox by setting the related prefs to false on the about:config page.

• browser.tabs.remote.autostart = false
• browser.tabs.remote.autostart.2 = false

• http://www.ghacks.net/2016/07/22/multi-process-firefox/