This is a limitation of the Mozilla based browsers.
Please, note that to protect users' private information, unprivileged scripts cannot invoke the Cut
, and Paste
commands in the Mozilla, Safari / Chrome and Opera rich text editor, so the corresponding buttons will not work. You can cut and paste content in Firefox, Safari /Chrome and Opera only using the Ctrl+X and Ctrl+V shortcut or the Paste from Word dialog.
You can also paste content from the browsers menu: Edit -> Paste.
More information is available in this help article: Cleaning Word Formatting
the Telerik team