FF : Custom attributes on links dropped during copy/paste

[Jon Kuhl]

Custom attributes on anchor tags are being dropped during copy/paste (Ctrl+C/Ctrl+V).

Steps to reproduce:

1. In Source mode, modify a standard link by adding a custom attribute (e.g. <a href="/index.htm" customAttribute="1">test</a>.)
2. Switch out of source mode.
3. Copy (Ctrl+C) the linked text.
4. Paste (Ctrl+V) on a new line.
5. Switch back to Source mode, and see that customAttribute="1" was not pasted.

Occurs on the demo page with the following environments:

• Browser: FF6 OS: Windows Vista, Windows 7
• Browser: FF5 OS: Mac
• Browser: FF3 OS: Windows Vista

[Jakub Ś]

Reproducible in Firefox browsers from CKEditor 3.0

[Alfonso Martínez de Lizarrondo]

Dup of #6631

[Jakub Ś]

This issue is a duplicate of #6631 and 6631 is a duplicate of #6275.

But ticket #6275 is set to fixed while issue with droping custom attributes in E.g. links or images when copy/paste is still reproducible.

I'm reopening this issue with keywords CantFix and VendorFix to indicate that issue occurs and this is Firefox specific problem with which we can't do much.