Works for me in the same version of Firefox.
Like I said in my last post, try seeing if adding the torrent even works in Deluge, could just be a dodgy torrent.
You could try reinstalling the deluge-webui package.
Other than that, I don't know how else I can help you, sorry.

Adding a torrent via the browse for file thing works fine for me.
You could try using a different browser; I'm using Opera.
Also check to see if the .torrent file you're trying to add is actually valid, maybe by adding it through the normal Deluge program first.

Just to let you know, this script will make the daemon and web interface load when your computer starts up, so that you don't have to open Deluge manually at all. You can just go to localhost:8112 straight away and it will work.

Same thing happened to me. To fix it I had to remove the first line in /etc/init.d/deluge-daemon so that instead of the start reading: #!sh #!/bin/sh ### BEGIN INIT INFO It now reads: #!/bin/sh ### BEGIN INIT INFO Seems it doesn't like that sort of interpreter reference for some reason. Anyway, hope...