I use Adblock Plus, EditThisCookie, User CSS, and my favorite...Long Press New Tab (which requires Download Chrome Extension since it's a Chrome extension).
I use User CSS to change black backgrounds to white on sites I visit frequently.
I use Adblock on all sites, except those that have no animated adverts.
I use EditThisCookie to block cookies on a few sites I frequent that annoyingly ask for "assistance" after a few visits.
Long Press New Tab should be integrated into Opera. I think it was at one time actually. It's a must-have for all browsers and I will not surf without it.