how to have ad-blocked browsing?
AdBlock does not make your browsing faster. It simply blocks ads. Maybe it does, but that's probably insignificant.

If you want to improve browsing speed, try Opera Max - Data manager.


  Opera Max is a free, data-savings and data-management app that extends
  your data plan. With Opera Max, you can easily manage your data by
  monitoring daily data usage and limit data-hogging apps to Wi-Fi only.
  Opera Max also provides data savings by compressing videos, photos,
  media and more on almost all of your favorite apps and websites -
  without any noticeable loss of quality. Data overage fees are a thing
  of the past with Opera Max!


You can also try Opera's Off-Road feature (different from Opera Max).


  Save time and money On a slow connection? Or, need to control your
  Android phone or tablet’s data use? Switch to Off-Road mode in Opera
  to save data and browse faster.


Or if you already have the Chrome Browser installed, enable Reduce Data Usage in its settings.


  Save Data - reduce mobile data usage by up to 50% while browsing