shtml page opens in Firefox

I am working on an already produced site. Some of the pages have a mozilla icon and when clicked open up in Firefox. I want them to open in DW. Why are some of the pages opening directly in the browser?

Thanks.

shtml page opens in Firefox

It's an OS setting - tell your OS to associate the file-type with Dreamweaver so that double clicking it will open it in Dreamweaver. Don't know what OS you're running so I can't be more specific about the steps...

Or use Dreamweaver's File panel to open up your site files as opposed to using the OS view.