Thank you for the crash report link. That one does seem graphics and memory allocation related, but I can't tell exactly what triggered the problem. Have you noticed any pattern to the types of pages where it occurs? Do the ones from after disabling hardware acceleration show a different "crash signature"?

Also, of course, Firefox 55 isn't supported any more. Which of your extensions that you can't live without is preventing you from upgrading? I see three legacy extensions: Session Manager, Saved Password Editor, and Tab Groups. Do you need suggested replacements for those?

@jscher2000

it started happening after updating to firefox 55 from firefox 54.

however it's especially bad today

it happened 4 times today

https://crash-stats.mozilla.com/report/index/256b23a3-a841-49cb-95e2-a74de0190413

https://crash-stats.mozilla.com/report/index/5a2f11dc-93ae-4dfe-aa1d-a5e2e0190413

https://crash-stats.mozilla.com/report/index/5b5e1202-cb97-4e7f-b4f0-6c9140190413

https://crash-stats.mozilla.com/report/index/a989db86-3b89-4420-adde-985590190413

in terms of extensions honestly all of it especially session manager since i did not find any good alternative to it.

Those are problems with content on a web page (Process Type: content (web)).

What memory usage does the about:memory page show? Do you have a lot of tabs open when this happens?

@cor-el

351.82 MB Web Content (pid 5360) as per e about:memory