Please disable Hardware acceleration Turning off hardware acceleration

Tried that and it still won't start

If you have submitted crash reports then please post the IDs of one or more crash reports that have this format:

• bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

You can find the IDs of the submitted crash reports on the about:crashes page.

• You can open the about:crashes page via the location bar, like you open a website.

See:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter
• https://support.mozilla.org/kb/Mozilla+Crash+Reporter

If you can't open Firefox then see:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter#Location_of_crash_reports
• http://kb.mozillazine.org/Mozilla_Crash_Reporter#Viewing_crash_reports

See also:

• http://kb.mozillazine.org/Firefox_crashes
• https://support.mozilla.org/kb/Firefox+crashes

All submitted tonight

bp-77b15fc0-b5e1-4d1e-88d4-be4fc2130227
bp-ce879684-8808-497b-b31d-6a7952130227
bp-d50c602b-6ce9-458a-a54b-496672130227
bp-609a847c-ef48-47f9-b257-992902130227
bp-50352628-2f21-431b-997c-e07322130227
bp-7bbb924a-4b50-4eb2-b009-a09c22130227
bp-5cd9adc7-bb78-4ce0-a038-b518b2130227
bp-c2639c97-e689-48f1-baf9-f3ea12130227
bp-28f36a95-aa7e-439f-b05c-a80a12130227
bp-61597fac-dc2b-462a-b3e0-f49572130227
bp-bae5dcd7-fa3f-4c3c-8745-889c42130227
bp-3d51ee52-1d19-4c2f-b34c-d33592130227
bp-1de78df6-2ab9-40bb-973a-592b72130227
bp-2c352f75-82d5-47ac-b3d7-b7f902130227
bp-3607a49f-e4c0-4d78-803a-fde132130227

Did you close and restart Firefox or possibly reboot the computer

• Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

• https://hacks.mozilla.org/2010/09/hardware-acceleration/

See also:

• bug 812683 - Win7 startup crash in _d2d_clear_surface @ CContext::RestorePipelineStateImpl (d3d11.dll, after installing KB2670838)

(please do not comment in bug reports: https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Thanks seemed to have solved by updating Graphics driver and disabling hardware acceleration.