This is a No button for the web. Unhappy with a site? Just say no.
Is a website annoying you with popups, redirects, animated banners, videos? Tell them NO with this app.
NO sends them a message in their site logs expressing your displeasure, then closes the tab.
Read more here: https://medium.com/@emlynoregan/a-no-button-for-the-web-60a8b4e78bd2
Update: Now it doesn't just close the tab, it'll back up through your history until you leave the site.