草刈り機, developed by retas, is a free browser add-on for Chrome that aims to improve your internet experience by eliminating annoying and unwanted links that are filled with excessive "草" (grass) characters. This add-on also hides the news section that appears at the top of the Nico Nico Live Player, allowing you to focus more on the live stream.

With the abundance of irritating links that end with "ｗ" or contain phrases like "○○した結果ｗｗｗｗ" or "○○なやつｗｗｗｗ" circulating on the internet, 草刈り機 comes to the rescue, providing a more pleasant and peaceful browsing experience. By removing these links, it brings comfort and tranquility to your online life.

In addition, the add-on includes a new feature in versionthat adds a close button to the hidden news section on Nico Nico Live. This allows users to quickly toggle its visibility, in case they want to access the news.

Please note that 草刈り機 does not apply to content inserted through inline frames (iframes) or to dynamically loaded content after the initial page load.