Choose File>Preview In Browser>Browser Name
Shortcut: Choose the Preview button in the toolbar.
Test in  Firefox, Safari
  and Explorer often.
  Dreamweaver creates a temp file that it uses to preview files, you don't 
  need this temp file on your website.
  •To add browsers to select from just select File>Preview In Browser>Edit Browser List. 
| Preview in Browser Button | 
|  |