Copypaste from Word issue in Firefox

Hi All,

I am using CKEditor 3.0. The editor is integrated into an ExtJS UI. The combination runs smoothly.
Recently I am facing one issue. If we are copy pasting commtent from MS Word we are loosing the font styles like Font-size, Font-type etc.

As per the functionality we have to maintain the same look and feel as that of MS Word, when its copy pasted.
This is happening only in FF.

I have tried using paste from Word window and also normal pasting. The problem is happening in both case.

Is this a configuration issue?

Please help.
Thanks in advance for help.

Regards
Arnab