It still leaves the gaps, both for the top banner and side ones. There's a guide somewhere on this site that tells how to remove the banner gap, although it may be for IE only, I don't remember.
Removing banner - http://webdesigns.ms11.net/chromeditp.html download that restart FF Go to tools-> chromedit plus -> chrom edit click usercontent.css go to VERY BOTTOM div.ban,div#ban, #ban, .ban, #ban_spacer {display: none !important;} .ad_wrapper,.ad_wrapper_fixed,#ban,#ban_bottom {visibility:hidden !important;} .adBox2, .footOverlay { display:none !important; } Copy/paste ^ into the bottom, LEAVE THE OTHER TEXT. Click save restart FF quoted directly from SoC.