The official uBlock extension. https://www.ublock.org/
uBlock is an ad and content blocker designed to be lightweight and efficient. uBlock blocks ads on all websites, including Facebook and YouTube. uBlock also protects you against malicious crypto-mining scripts used by sites to use your CPU and slow down your web browsing. One of the fastest adblockers available, uBlock is easy to set up, easy to use, and can also support flexible customization -- from adding your own custom filter lists to powerful Dynamic Filtering and more.
uBlock has been downloaded millions of times and is used all over the world. Please install today and enjoy a hassle-free browsing experience.
Illustrated overview of its efficiency:
Open source with public license (GPLv3)
For users by users.
If ever you really do want to contribute something, think about the people working hard to maintain the filter lists you are using, which were made available to use by all for free.
Contributors @ Github:
Extore is a team of professionals who are passionate about creating extensions for web browsers. This devotion also gives us opportunity to appreciate work of other people. We get inspired by useful, open source extensions made by developers all over the world. Our strong belief is that one should share helpful add-ons with others. That’s why we’d like to present you our ever-growing list of favourite extensions that have inspired us. Moreover, as you probably have already learned, sometimes struggling for the best brings an end to the good. Talking about add-ons it often turns out that an upgrade is worse then previous version. Also it can become really tricky to get back to the beloved version of your favourite extension. That’s why we’re going to make not only the latest, but all versions of our favourite (and we hope yours too) add-ons available for download. No more compromises, just stick to the version you really like!