You can block advertising and trackers with Cheerio on macOS Sierra

Accesources has introduced Cheerio for macOS Sierra, which blocks the loading of advertisements on web pages. 

The tool removes advertising, trackers, and other unwanted elements from web pages when using Safari on your Mac. It makes pages load faster, uses less data on your cellular/Wifi connection, and improves your Mac battery life., according to the folks at Accessories. You can block ads, rollover ads, video ads, banners, overlay or expanding ads and other marketing content.

Cheerio requires macOS Sierra. It costs $0.99 and is available exclusively through the Mac App Store in the Utilities category.