Were there any crash reports?

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,

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.

dforrest said

I repeatedly get the error message “Plugin Container for Firefox has stopped working. A problem caused the program to stop working correctly. Please close the program”. I have repeatedly tried all the actions recommended to resolve this including Refreshing Firefox but it returns. Is there any way I can diagnose what the actual problem is (which “container”)?

https://crash-stats.mozilla.com/report/index/bp-c80c3960-44a3-482b-8da4-14b172150606

https://crash-stats.mozilla.com/report/index/bp-6aab805a-8ffe-4117-b720-887d62150501

https://crash-stats.mozilla.com/about/throttling

Signature F1398665248_____________________________

Process Type plugin Shockwave Flash Version:17.0.0.169

Product Firefox Version 37.0.2

Release Channel OS Windows NT OS Version 6.0.6002 Service Pack 2

Download Firefox Full Installer For All languages And Systems {web link}

Update your Flash Player Version 17.0.0.188
https://www.adobe.com/products/flashplayer/distribution3.html

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

I did all you recommend, including installing an updated graphic driver. Now I get the problem less often but it still remains.

Well, it's a start. Please post the newest crash reports.

Is it a flash crash like the others? This may help;

Flash block {web link} Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on it

Yes it is. Reports are attached.

https://crash-stats.mozilla.com/report/index/bp-37621eac-be28-4d1a-acc8-d83362150606

https://crash-stats.mozilla.com/report/index/bp-24e7c236-23e5-409d-a128-dc6d62150606

Signature F1398665248_____________________________

Process Type plugin Shockwave Flash Version:17.0.0.169

Product Firefox Version 37.0.2

Please see; https://support.mozilla.org/en-US/questions/1065820#answer-737908

This is refering me back to this same report.

You did not update Firefox. You did not update Flash. And what about your graphics drivers?

I did all of those immediately after you advised me to do so yesterday.

My error was that I earlier today, by mistake, sent you error reports dated yesterday.

I have had the error three times today but do not see any error reports with today's date when I run "about:crashes".

Did you get a Firefox crash window / alert, or something else?

No, after closing and before restarting I get a message saying that there has been a pligin container error.