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function SaveNamer_onSaveNamedLink()
{
 // use selected text as file name if there is any
 var fileName = document.commandDispatcher.focusedWindow.getSelection().toString();

 // use link to name the file otherwise
 if (!fileName) fileName = gContextMenu.linkText();

 // remove misbehaving characters
 fileName = fileName.replace(/^\s+|\/|\?|\:|\%|\&|\'|\"|\;|\!|\s+$/g, "");

 //https://developer.mozilla.org/en-US/docs/XPCOM_Interface_Reference/nsIFile
 //https://developer.mozilla.org/en-US/docs/Code_snippets/File_I_O
 var dest = Components.classes["@mozilla.org/file/directory_service;1"]
  .getService(Components.interfaces.nsIProperties)
  .get("Desk", Components.interfaces.nsIFile);
 dest.append(fileName + ".html");

  var aChosenData = new AutoChosen(dest,
  makeURI(gContextMenu.linkURL, gContextMenu.target.ownerDocument.characterSet));
 var aReferrer = makeURI(gContextMenu.target.ownerDocument.URL,
  gContextMenu.target.ownerDocument.characterSet);

 //toolkit/content/contentAreaUtils.js
 internalSave(/*aURL*/ null, /*aDocument*/ null, /*aDefaultFileName*/ null,
  /*aContentDisposition*/ null, /*aContentType*/ null,
  /*aShouldBypassCache*/ true, /*aFilePickerTitleKey*/ null,
  //aChosenData, aReferrer, true); return; dummy( // Iceweasel 17
  aChosenData, aReferrer, /*aInitiatingDocument*/ document,
  /*aSkipPrompt*/ true, /*aCacheKey*/ null);
}