FireFox on paste bug

Hi All !


I have installed fckeditor in my domine and when I paste a link of this domine using firefox, the relative url
of this link has changed, it has changed from relative url to absolute url.

For Example: Html code => <a href="Contact_us.html" >Contact us</a>
It's replaced for the follow

<a href="../../Contact_us.html" >Contact us</a>

What Can I do to prevent this? Is it a possible bug?

Thank you, very much

I wait your answer