Thunderbird hangs up frequently

What does this mean? Is it not responding? What are you doing when this happens?

apparently crashes

Does it hang or crash? That's not the same thing. In the latter case, please post a crash ID. https://support.mozilla.org/en-US/kb/mozilla-crash-reporter-tb#w_viewing-crash-reports

Thanks for your reply.

I am not sure how to answer your question. I had assumed from viewing the reports in the Error Console that what I was experiencing as "hanging up" might well be a crash and restart, even though the screen did not fully disappear.

So I will say it is "hanging up" -- sometimes briefly for 15 to 20 seconds and at other times longer, up to several minutes. What I mean by that is that Firefox stops responding (i get that message too at the top) and then will start responding. Other times, it stops responding and the screen turns a light, slightly transparent white. And then later responds.

When I say responding, I mean that I can continue to work in Firefox such as typing in an e-mail or inserting a graphic or including a link.

I cannot interpret the information that the Error Console is showing and hence do not know what to do to fix the "hanging up" problem.

Thanks again for your response. I hope my response is of some help to the question you are asking.

John____

What is your anti-virus software?

Avast Pro 11.1.2253

https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues#AVAST

So you still haven't answered the question about how to use the Error File.

Am I suppose to send it to somebody? Or how do you read and make sense out of it?

Mac, Berkeley