Using Biblia on a Widescreen monitor, the empty margins are irritating to me - much nicer to use as much of the screen real estate as possible. To this end, I've thrown together a chrome/firefox extension to toggle biblia to use all of the available screen-estate.
It can be installed from: http://userscripts.org/scripts/show/125851
Just a feature wish - and chrome/firefox extension to provide it.
If anyone is interested, I've also thrown together a tweak which replaces the standard scrollbars with more spatially efficient ones - as shown below. It's available here: http://userscripts.org/scripts/show/125924