Its just a matter of configuring the toolbar in qa-wysiwyg-editor.php. Got to lines 137 to 149 and find this
"qa_wysiwyg_editor_config={toolbar:[".
"['Bold','Italic','Underline','Strike'],".
"['Font','FontSize'],".
"['TextColor','BGColor'],".
"['Link','Unlink'],".
"'/',".
"['JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock'],".
"['NumberedList','BulletedList','-','Outdent','Indent','Blockquote'],".
"['Image','Flash','Table','HorizontalRule','Smiley','SpecialChar'],".
"['RemoveFormat', 'Maximize']".
"]".
Replace with this
"qa_wysiwyg_editor_config={toolbar:[".
"['Find','Replace','-','SelectAll','-','Scayt'],".
"['Bold','Italic','Underline','Strike'],".
"['Font','FontSize'],".
"['TextColor','BGColor'],".
"['Link','Unlink'],".
"['RemoveFormat', 'Maximize'],".
"'/',".
"['Cut','Copy','Paste','PasteText','PasteFromWord','-','Undo','Redo'],".
"['JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock'],".
"['NumberedList','BulletedList','-','Outdent','Indent','Blockquote'],".
"['Image','Flash','Table','HorizontalRule','Smiley','SpecialChar']".
"]".
It adds a row of find, replace, select all and scayt - "['Find','Replace','-','SelectAll','-','Scayt'],". - which needs to be enabled when clicked, I have tested it in Chrome and Firefox and it works for me. I have also added
"['Cut','Copy','Paste','PasteText','PasteFromWord','-','Undo','Redo'],". For added functions.
To tidy it up i have moved "['RemoveFormat', 'Maximize']". to the top line and added a comma before the quotation mark. This meant removing the comma from the end after SpecialChar']