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Firefox segfault at startup ("Firefox quit unexpectedly); OS X 10.12.6
Started happening following system update. Apple crash report (truncated due to space restriction):
Process: firefox  Path: /Applications/Firefox.app/Contents/MacOS/firefox Identifier: org.mozilla.firefox Version: 57.0.2 (5717.12.6) Code Type: X86-64 (Native) Parent Process: ???  Responsible: firefox  User ID: 1077044561
Date/Time: 2017-12-22 08:21:46.349 -0600 OS Version: Mac OS X 10.12.6 (16G1114) Report Version: 12 Anonymous UUID: B95CF3FD-9AB2-6C6C-0C01-6A12972E6E17
Time Awake Since Boot: 920 seconds
System Integrity Protection: enabled
Crashed Thread: 1
Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000001041dec92 Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler 
External Modification Warnings: Thread creation by external task.
VM Regions Near 0x1041dec92: -->
__TEXT 0000000107406000-0000000107408000 [ 8K] r-x/rwx SM=COW /Applications/Firefox.app/Contents/MacOS/firefox
Application Specific Information: dyld: launch, loading dependent libraries /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
All Replies (3)
We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.
The crash report is several pages of data. We need the report numbers to see the whole report.
- Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
- Copy the 5 most recent Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.
Note: If a recent Report ID does not start with bp- click on it to submit the report.
(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)
Thank you for your help!
More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.
Unfortunately the browser does not open, so getting to about:crashes is not possible. It looks like it's crashing before the Firefox crash handler is available. I believe this is actually the same issue as https://support.mozilla.org/en-US/questions/1193783 -- the common fixes do not work for this issue.
uninstall Firefox. Then Delete the Mozilla Firefox Folders , do not delete your Profile Folder (no idea of locations on a Mac) Note: your Firefox Profile is saved.
Reinstall with Current Release Firefox 57.0.2 with a Full Version Installer
If there is a way to update your Video Card Drivers or Reinstall them would be great.
If/when it gets back up : Create a new profile as a test to check if your current profile is causing the problem.
See Creating a profile :
If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem. Never work with original files.
Please let us know if this solved your issue or if need further assistance.