Nico Search Extension is a Chrome add-on developed by AengSang. It aims to enhance the tag search functionality on NicoNico, a popular video sharing platform in Japan. This free extension provides four main features to improve the search experience.

Firstly, when searching for tags on NicoNico, the extension automatically applies exclusion tags, allowing users to filter out unwanted content. Secondly, it offers a convenient pop-up window that enables users to perform tag searches that include exclusion tags. This saves time by eliminating the need to manually add exclusion tags each time.

In addition, Nico Search Extension allows users to easily add exclusion tags by right-clicking on a tag. This feature provides a quick and intuitive way to customize search preferences. Lastly, the extension alerts users when they accidentally open a video that contains exclusion tags, preventing any unwanted surprises.

The exclusion tag settings in features 1 and 2 can be toggled on or off, and users can customize the exclusion tags according to their preferences.

Overall, Nico Search Extension is a useful tool for NicoNico users who want to enhance their tag search experience and filter out unwanted content. It provides convenient features that save time and improve search accuracy.