User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:23.0) Gecko/20100101 Firefox/23.0 (Beta/Release) Build ID: 20130814063812 Steps to reproduce: Steps to reproduce : 1. Go to http://jsfiddle.net/gtSa3/10/ 2. In each contenteditable 3. Select all 4. Copy-Paste Tested and reproduced in 23.0.1, 24.0b4 and 26.0a1 Actual results: For h1 and span, the element is selected entirely and duplicating itself. For others like divs, it is working maybe because of this being fixed : https://bugzilla.mozilla.org/show_bug.cgi?id=562905 Expected results: Only the text should be duplicated in the element.
See also bug 562905 and 583980. This a dupe?
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