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 in Safe Mode;

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.

Still in Safe Mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites. Are there any problems?

Thankyou FredMcD

I tried to do as you requested last night.

1) I went into safe mode and typed about:crashes. There were 3 reports. 1 old one 25/12/2014 this had no BP. and 2 recent, both with BP. I think I often say dont send report, as I am too busy and it takes more time if it crashed when i was doing something important.

I could not send the 3rd, as in safe mode, i could not get hot spotting to my iphone to register. didnt pick the internet connection up for some reason. So I could not see what was in the two BP reports either.

2) I turned off hardware acceleration. I now remember before I installed fresh yosemite, Cor-el had asked me to do as you asked, turn off hardward accelaration. Back then I noticed it had no impact (improvement or stopped things).

yesterday, Fx behaved much more nicely. Was working, i could hear it but still moving fast. So lets see what today is like..

Please post the crash report numbers. And in the future, if Firefox crashes, send the reports. It only takes a moment.

How can we fix it, if we don't know it's broke?

Hello FredMcD, I just discovered i can access them from normal mode. I have sent the 3rd one now. Crash reports take more than a sec to save often. From my prior bad experience, I learnt not to save unless in troubleshoot mode else takes more time when i am simply just trying to use fx and get my work done. So I save once I see a trend of poor performance or something very odd happens. Fx had been working brilliant until upgrade to v37.0.2, so it wasnt until likely a few crashes I would then start to save them. >Are these crash reports stored in DOM? >And do they contain private information? Thankyou

Report ID Date Submitted bp-f760c330-1b06-44e6-a7d2-da9b02150501 2/05/15 8:47 am bp-82045c14-a9f7-4c8c-a2cc-411de2150428 29/04/15 8:14 am 9C04067A-3D60-4344-B202-04396A8F4FAD 25/12/14 2:35 am

Crash reports only show information about your system, and Firefox.

For example;

Product Firefox Version 37.0.2

OS Mac OS X OS Version 10.10.2 14C109

The report flagged these programs;

AppKit

libsystem_kernel.dylib =  ? Word for Mac

CoreFoundation

For some time now, many Macs running Microsoft programs have been crashing. Check with Mac / Microsoft support sites.

Thanks FredMcD for your help.

I dont use Microsoft programs. So is there something in Fx trying to still use it? I created a new FX profile when i did the fresh install of yosemite also and migrated only the critical bits e.g. bookmarks

Before I upgraded to v37.0.3 and 10.10.3 from 10.10.0 and not sure what FX was before upgrade, performance was slick as. this is like 10 days ago now I think.

Before I did the fresh install of yosemite (so when I was on mavericks osx) I had word for mac. But I dont believe I reinstalled it. I cannot find it on my MBP. --- Also I had to turn back on hardware acceleration. As the graphcis on some web pages and in some OSX app (e.g. Console) were going funny.

Now I turned it back on, i have not seen the graphic problem. fingers crossed.

The crash report shows libsystem_kernel.dylib is on your system.

What else is there . . . . . .

Thankyou for stating the obvious. The assumption that is being made is the file in question = word for mac. Word for mac is not installed on MBP.