BlockSite - BlockSite is an extension, which automagically blocks websites of your choice.
Ad Skipper for YouTube - Ad Skipper for YouTube – Skip and Mute YouTube ads is a powerful Android tool specially designed for YouTube streaming lovers who want to enjoy the high-quality fast streaming experience without any irritation from ads.
FocusMe - With so much access to information and distractions on the internet, it's easy to get sidetracked.
Ads-Shield - Ads-Shield: Content Blocker is an all-in-one ad-blocking app that stops all kinds of ads in your browser, Facebook, YouTube, and even other third-party apps.
Stay Focused - More suitable with Google Chrome, this service enables you ensure you do not waste precious time on updating Facebook status or chatting with people.
Bromite - Bromite is Chromium plus ad blocking and privacy enhancements; take back your browser!