I also had to change my userChrome.css file so that I could change the width of my search-bar. Unfortunately, the directions which I had previously used were old and didn’t quite work.

To change the width of the search bar, the following needs to be in you userChrome.css file:

/* Make the Search box flex wider
(in this case 400 pixels wide) */
#search-container {
-moz-box-flex: 400 !important;
}
#searchbar {
-moz-box-flex: 400 !important;
}


And here’s my newly updated startup script:

#!/bin/bash
FF=/usr/local/firefox
url=$1
[ -z $url ] && url=about:blank
## Run Firebird remotely if there's an existing process running...
if [ -x $FF/firefox ] ; then
$FF/firefox -remote 'ping()'
if [ $? -eq 0 ]; then # Already running -> new-tab
$FF/firefox -remote "openURL($url,new-tab)" &
else
$FF/firefox $url &
fi
fi