The Add-on Version 1.1 from Daniel Siegers supports now the Firefox Context Menu.
Select the URL, - right click - , then send the URL to your Windows Home Server.

Firefox Add-on

Perhaps you've noticed the Context Menu in the Download Pool?

Let me explain the functions behind the Context Menu.

• Pause
  The Pause function pauses the selected item, so that the download won't start
  until you change the status.
• Download Now
  The Download Now function changes the status to added and changes the time
  to the current time. The download is soon to be started.
• Retry
  The Retry function changes the status to added but doesn't change the date/time.
  This Function should be used, if you get an error and want to retry the download.
• Delete
  The Delete function removes the the selected row from the Download Pool.