In a content editable page right clicking within a div highlights all content within the div
Open the following page in firefox. In a separate tab open another page, highlight some content and copy it. Move back to the original tab and try pasting the content. Whenever you right click in the area which is within the div tags the whole content between them gets highlighted.
<html>
<head><title>edit area</title></head>
<body contenteditable="true">
<div style="font-family: 'Times New Roman'; font-size: 16px;">These are a few of my<br>favourite<br>things :<br><br></div>
</body>
</html>
eshwar.rao trɔe