CKEditor - HTML source cannot be copy-pasted in Firefox

1. Login to CMS
2. Open a existing document in Edit mode (path=/content/documents/gettingstarted/news/2011/toyota-suggests-putting-a-glass-of-water-on-your-dash)
3. Click the source button in ckeditor and copy the html content
4. Now create a new document, fill the title, in ckeditor click on source and paste the copied content.
5. Click the source button again (I see the rich text as expected no issues)
6. Now click on save & close button

Expected - Rich editor content should be shown
Actual - Rich editor content is empty, below exception is shown in console
[INFO] [talledLocalContainer] 11.11.2013 14:29:20 WARN http-bio-8080-exec-9 [ChannelActionsPlugin.isVisibleInPreview:202] Document '/content/documents/gettingstarted/news/2011/text-copy-pasting/text-copy-pasting[2]' does not contain the property 'hippo:availability'. No 'View' menu items will be shown.
[INFO] [talledLocalContainer] 11.11.2013 14:29:20 WARN http-bio-8080-exec-9 [XmlAjaxResponse.writeComponent:95] Component '[FeedbackPanel [Component id = feedback]]' with markupid: 'id21e' not rendered because it was already removed from page
[INFO] [talledLocalContainer] 11.11.2013 14:29:20 WARN http-bio-8080-exec-9 [ObservableRegistry.addObserver:135] Same observer [GalleryPickerPlugin [Component id = service.render]] registered multiple times