Is this the only website with the problem??

In case one of your extensions is involved, could you test in Firefox's Safe Mode? That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. More info: Diagnose Firefox issues using Troubleshoot Mode.

You can restart Firefox in Safe Mode using either:

• "3-bar" menu button > "?" button > Restart with Add-ons Disabled
• Help menu > Restart with Add-ons Disabled

Not all add-ons are disabled: Flash and other plugins still run

After Firefox shuts down, a small dialog should appear. Click "Start in Safe Mode" (not Reset).

Any difference?

The mozilla addy just got highlighted because it's in the error message box. It does it everywhere. I just did what you said and it definitely runs faster now. Let me use it for a day and see if it still does it. It only does it 'sometimes' I can't seem to identify a common thing that triggers it but I figured it's some of this junk I've got on here as add ons.

Yeah I just ran it through the wash and that seems to have solved it... Thanks!!!!!