AdBlock is a free browser extension that blocks or hides ads on web pages you visit in a browser in which AdBlock has been installed. It is one of the most popular ad blockers in the world and the most popular browser extension of any kind for Chrome and Safari.
What browsers does AdBlock work with?
Windows: Google Chrome, Mozilla Firefox, Microsoft Edge
MacOS: Chrome, Firefox, Apple Safari
ChromeOS (Chromebooks): Chrome
Linux: Chrome, Firefox
iOS (iPhone/iPad): Safari
Android: Samsung Internet, Firefox
Unsupported but compatible: Vivaldi, Pale Moon
How does AdBlock work?
Please see this post in AdBlock's Blog for an introduction to how ad blockers work.