Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options) key, and then starting Firefox. Is the problem still there?

While still in Safe Mode,

Some of your crash reports weren’t sent to the Mozilla Servers.

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.

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.

Here you go. I've checked the Console and Activity Monitor and I'm still seeing occasional spin dumps and other kernel error reporting. Those are copied and pasted below as well.

bp-b58410e7-e6f2-4858-a909-45d252150603 6/2/15 21:51 bp-59947ee3-7cf9-4499-a0ba-760e22150526 5/25/15 23:04 bp-5873ca73-f70a-413a-a7e7-4c66a2150409 4/9/15 10:51 bp-99296322-c936-4e41-a92f-fa95a2150330 3/29/15 23:19 bp-57737c91-74f5-4c31-bcd7-082092150326 3/26/15 13:10 bp-cad6e4eb-b50a-4024-ae1a-8d3d72150323 3/22/15 23:51 bp-a036d5ba-8a2b-48a7-a581-8fd242150319 3/19/15 12:33

CONSOLE FIREFOX MESSAGES 9/27/15 21:22:05.973 ReportCrash[709]: Invoking spindump for pid=602 wakeups_rate=257 duration=176 because of excessive wakeups

9/27/15 22:33:30.000 kernel[0]: process firefox[800] caught causing excessive wakeups. Observed wakeups rate (per sec): 203; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 45004

9/27/15 22:33:33.687 spindump[454]: Saved wakeups_resource.diag report for firefox version 41.0 (4115.9.17) to /Library/Logs/DiagnosticReports/firefox_2015-09-27-223333_Agent-Vanillas-Macbook.wakeups_resource.diag

9/27/15 22:36:55.842 firefox[825]: WARNING: The Gestalt selector gestaltSystemVersion is returning 10.9.5 instead of 10.10.5. Use NSProcessInfo's operatingSystemVersion property to get correct system version number. Call location:

9/27/15 22:41:04.000 kernel[0]: process firefox[825] caught causing excessive wakeups. Observed wakeups rate (per sec): 180; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 45009

9/27/15 22:41:06.378 spindump[454]: Saved wakeups_resource.diag report for firefox version 41.0 (4115.9.17) to /Library/Logs/DiagnosticReports/firefox_2015-09-27-224106_Agent-Vanillas-Macbook.wakeups_resource.diag

The crash report flagged these programs;

Product Firefox Version 37.0.1

Release Channel release OS Mac OS X OS Version 10.9.5 13F1066

Signature shutdownhang

libsystem_c.dylib = ? Word for Mac

libsystem_kernel.dylib =  ? Word for Mac

libdispatch.dylib =  ? Word for Mac

libsystem_pthread.dylib =  ? Word for Mac

For some time now, a lot of Mac’s with Microsoft programs have been crashing. Check with Microsoft / Mac support sites.

https://support.mozilla.org/en-US/kb/update-firefox-latest-version 41

The instability I've noted has been well after the crash reports included above. Instability started in the last couple of weeks. What about MS Office would cause Firefox to exceed wakeup thresholds?

Upgrade your Firefox to the current (link above).

As a test, remove ALL Microsoft from your system. You can always reinstall it later.

I may have found the root cause. A bank suggested that I install something called Trusteer Rapport as a part of their InfoSec recommendations.

https://www.trusteer.com/support/mac-install-instructions

In additional to Firefox acting flaky, I suddenly started to see kernel panics for the first time. One of those panic messages flagged this software. I've removed this software and both Firefox and the Mac have been much more stable.

Will continue to monitor but I think I have it. Will close this issue ticket.

Trusteer Rapport has caused users problems in the past, and still does. Contact their support site.

I went one better and removed the software.