Hi LarryDaymon, Is this about web-mail or Thunderbird?

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

LarryDaymon said

when typing an outgoing email every few words or even a few letters give me the error message that recent changes may have not been saved

Hello LarryDaymon,

Just in case you are using Gmail :

This has been an issue that re-occurs from time to time and their support says :

"Use the Gmail BASIC HTML version https://mail.google.com/mail/u/0/h/1p7bjmn9vg2de/?zy=e&f=1 as the users have reported it working for them."