I tried all the browsers with adblockers, opera really uses less data than the others but it have the problem that it doesnt have the plugins that block the ads. otherwhise, those browsers that have de plugin don't work really well, most of the times they block parts of the pages, and sometimes is really annoying, also we continue having the problem with those pages that block the adblocker, as a programmer I know the struggle to lidiate with those problems, the modules nowadays are strong enought to block all the ads in mobile webpages, but the probles is that the pages for mobiles are bad constructed and most of the time they are a completely chaos.
i think we will need to be patient to see a browser that blocks all the ads