HAbilitar pegado, corte (cut,paste) en Navegador Mozilla, firefox (clipboard o portapapeles)

http://support.omniupdate.com/documentation/ox/implementation/otherresources/firefox/

Turning on Cut/Copy/Paste in the Firefox browser

For Firefox on Windows:
1. Quit Firefox. If you have Quick Launch running (in Windows, an icon in the toolbar), quit that too.
2. Find your Firefox profile directory. On Windows, this is often located in C:\Documents and Settings\<Windows login>\Application Data\Mozilla\Firefox\Profiles\<one folder>.
(For more info on locating your profile folder, use the search term 'editing configuration files' in the Firefox Knowledge Base at: http://support.mozilla.com/en-US/kb/ ), in Windows 7 this is accessed by typing %appdata% in the location bar.
3. Open the user.js file from that directory in a text editor. If there's no user.js file, create one.
4. Add these lines to user.js:
user_pref("capability.policy.policynames", "allowclipboard");
user_pref("capability.policy.allowclipboard.sites", "http://www.omniupdate.com http://omniupdate.com https://www.omniupdate.com https://omniupdate.com");
user_pref("capability.policy.allowclipboard.Clipboard.cutcopy", "allAccess");
user_pref("capability.policy.allowclipboard.Clipboard.paste", "allAccess");
Note: the 'capability.policy.allowclipboard.sites' user_pref can have additional sites
in the value list. Each site must be space-separated, and can be anything
from a specific URL to an entire domain.
5. Save the file, and restart Firefox. The Clipboard buttons of the WYSIWYG toolbar should now function as expected.