If you use the CKeditor module instead of Wysiwyg, feat not, you can still use the plugin!
All you need to do is add the following in modules/ckeditor/ckeditor.config.js :
config.extraPlugins += (config.extraPlugins ? ',footnotes' : 'footnotes' );
CKEDITOR.plugins.addExternal('footnotes', Drupal.settings.ckeditor.module_path + '/../footnotes/footnotes_wysiwyg/ckeditor_plugin/');
Closed: outdated
2.5
footnotes_wysiwyg
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