Social Filter is a free Chrome add-on developed by fukushun1994. It aims to add a touch of social interaction to your browsing experience. This add-on replaces specified words on webpages with the phrase "にゃーん". By default, the add-on replaces words like "死ね" (die), "疲れた" (tired), and "なんであいつのために俺が苦労しないといけないんだ" (Why do I have to go through all the trouble for that person?). However, you have the option to customize the words to be replaced.

With Social Filter, you can create a more positive and friendly online environment. Instead of encountering negative or stressful words, you'll see cute and playful "にゃーん" instead. Whether you're browsing social media, reading news articles, or visiting any website, this add-on will bring a little fun to your online interactions.

Please note that Social Filter is specifically designed for Chrome browsers. If you're looking for a way to add a touch of whimsy to your browsing experience, give Social Filter a try.