http://www.tersetechtips.com/how-to-Change-Firefox-Bookmark-Icons-favicons-Without-Extensions-or-addons/

Perhaps something like this might work:

#personal-bookmarks .bookmark-item[label="label name here"] image {
  list-style-image: none !important; 
  background: url(your image here) no-repeat !important;
  width: 0 !important;
  padding-left: 16px !important;
}

Sonny, You mean well sir. But it can't be that hard. ZERO coding. I have a utility that makes "favicons." So grab a screen capture, convert it to a 16x16 icon file. All that remains is to "point" the web browser to that icon.

For example, if I "right click" on a browser bookmark, there should be a button to direct the browser to a 16x16 ico file. See what I mean? Zero coding should be involved.

So in the enclosure's case, I grabbed this from VistaPrint's web site (they make business cards). Ran it thru a utility to transform it from JPG to an ICO file. Now all I need to do is tell the browser where that ICO file is. Even for purposes of this tech support thread - the file name was disabled.

Best regards, Joe