[shep]

The core dumps were with the increased datasize. I was not sure that the defaults were being utilized by the firefox-esr window but if they are then I may need to look at other ways the problem could be addressed.

I failed to mention earlier that I also get occasional core dumps with the mutt email client. My sense is the dumps occur when mutt calls getmail to fetch a number of emails, say around 10. After the pop emails have been retrived a prompt to continue appears. When I hit any key to continue the hard drive sounds off and mutt crashes. On restarting mutt the emails are listed and intact. Mutt only crashes when calling another program, ie getmail, xpdf or firefox-esr as listed my mailcap and only when the file content is large.

Is there are way to check the limits on a running instance of firefox-esr? If this is the solution I will generate executable scripts in my home directory for firefox-esr, chrome and mutt as best practice.