In firefox, after using adblock, there should be some white block in the navigate pages. So this CSS can remove them.

In opera, just leave in css:
#Header #Top #Logo
{ display: none !important; }
#Header #Top #Menu #Mt1
{ display: none !important; }
#Header #Top #Menu #Mt2
{ display: none !important; }
#Header #Top
{ display: none !important; }
#ContentTop #CtCenter #CtCTop #CrctTitleb #right
{ display: none !important; }
#Ws #End #AdsE
{ display: none !important; }
#Ws #Top #AdsT
{ display: none !important; }