Updated Firefox to most recent version, then installed MS Office 2010 with MS Word 2010. Then attempted to copy and paste a selection from the internet using Firefox as the browser, but when MS Word 2010 was opened, all paste functions were greyed out and non-functioning. Eventually, I closed Firefox and opened MS Internet Explorer to browse the internet and attempted the same copy and paste on the same selection of text on the internet, but when MS Word 2010 was opened, all of the paste functions worked. Seems like MS is blocking the text copy and paste function in MS Word unless the internet browser is MS Internet Explorer. The previous version of MS Word was 2007 and it functioned the same for both Firefox and MS Internet Explorer when internet text selections were copied and pasted into a MS Word document. Operating system is Windows XP with all service packs.