Image not appearing in Dave's

Q: "I am having trouble with the logo appearing on my webpage for Dave.  I get a red X in a box.  I have rechecked and rechecked my coding and can't figure out what I am doing wrong.  Can you please see if you can find an error in my codes?
<h1 style="text-align: center"><img src="logo.jpg" alt="Dave's Devil Sticks" /></h1>"

A; The problem is that your image file must be in the same folder. Did you download the data files?  Work within those folders.

Firefox Portable (and (Notepad ++ Portable)

"I have a question regarding the downloading of Firefox.  Under the heading Internet, Mozilla Firefox, portable edition is listed.  Is this what we should download?" 

A: Yes, download it to your flash drive so that you have it wherever you go.