You might have some luck with the following edits to your FF's user.
js conf file as found here:
http://www.pbworks.net/?Useful_guide...ste_in_Firefox
Please note that there seems to be word of a new issue with copy/paste in recent FF 1.5 releases and as such this method comes without warranty.
The instructions for those who don't want to click through:
1. install chromEdit extension and restart Firefox
2. go to the Firefox' "Tools" menu > Edit User Files > cick on the "user.
js" tab
3. add the following lines in the "user.
js" file:
user_pref("capability.policy.policynames", "allowclipboard");
user_pref("capability.policy.allowclipboard.sites" , "http://www.site1.com");
user_pref("capability.policy.allowclipboard.Clipbo ard.cutcopy", "allAccess");
user_pref("capability.policy.allowclipboard.Clipbo ard.paste", "allAccess");
4. change "http://www.site1.com" with the website's url you want to grant access and restart Firefox
If you need to grant copy/paste access to more than one website, then you may add the websites urls separated by a blank space, like this:
user_pref("capability.policy.allowclipboard.sites" , "http://www.site1.com http://www.site2.com");
HTH.
pepijn