Opera has taken the step of building in an ad blocking feature which it claims makes site loading, on average, 45% faster. Users don't need a plug in, or add on, it's within the browser. The feature is off by default, but will offer users the option of turning it on when browsing a specific site. These option can be turned on or off per site, and users can create an exception list to let sites and their ads through. The version with ad blocking is available in the developer channel. [
opera.com...]
... together with the native ad-blocking feature, we also provide a tool to help advertisers and users understand the problem of heavy ads. We believe this will accelerate the change that the ad industry needs to pursue. Opera For Desktop Gets Native Ad Blocking [opera.com]