Hello new to HTML created my first page on a MAC using Textedit then Sublime. My page is fine on Chrome yet on Mozillza and Firefox at the end of some of my tags I see these symbols.


Any ideas?
Code is below:
<!DOCTYPE html >
<html>
<body>
<h1>My First Heading</h1>
<p> My First paragraph.</p>
</body>
</html>