Product Firefox Version 46.0.1 Build ID 20160502172042 Release Channel release OS OS X 10.11 OS Version 10.11.5 15F34

Signature: libsystem_kernel.dylib@0x16f06

This is for Sumo's Related Bugs 1269472 RESOLVED FIXED Hard crash in WebRTC when disconnecting headset

1267288 NEW --- crash in libsystem_kernel.dylib@0x16f06

1218070 NEW --- crash in libsystem_kernel.dylib@0x16286 with mozilla::gl::TexSubImage2DHelper

Do you have any other crash reports?

The report is somewhat similar to graphics crashes with videos, but those do not usually occur within 1 second of startup.

Could you try starting Firefox in its Safe Mode? In Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is not running: Hold down the option (Alt) key when starting Firefox.

If Firefox is running: You can restart Firefox in Safe Mode using either:

• "3-bar" menu button > "?" button > Restart with Add-ons Disabled
• Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

I cannot start in safe mode. I've tried that already. Firefox crashes before I can press the safe mode button

The most unusual aspect of the report to me is seeing "MySpeed" in the thread. Did that program update recently?

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

I've tried that, it crashes before I can press the safe mode button each time

I disable my speed and was able to go in safe mode

mar26 said

I disable my speed and was able to go in safe mode

Okay, that's some progress. I'm not sure what MySpeed does, but maybe let them know there's a new issue?