Hi geeo1122-joe, Unfortunately, Firefox has ended support for Windows XP

still trying to fix problem, thanks anyway.

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

The advice did help somewhat. The problem is not gone completely but it happens a lot less. Thanks for your help.

Did you check what extension is causing your problem.

If it works in Safe Mode and in normal mode with all extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) disabled then try to find which extension is causing the problem by enabling one extension at a time until the problem reappears.

• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Close and restart Firefox after each change via one of these:

• "3-bar" menu button -> Exit (Power button)
• Windows: File -> Exit
• Mac: Firefox -> Quit Firefox
• Linux: File -> Quit

In Advanced general option. I had to uncheck use hardware acceleration when available This option has reduced error alot . Thanks