Astro Detected is a free Chrome add-on developed by Shinya Fujino. It falls under the category of browsers and specifically belongs to the subcategory of add-ons and tools. The main purpose of this add-on is to detect whether the user is on an Astro page.

The functionality of Astro Detected is straightforward. When the add-on detects that the current page is an Astro page, the extension icon in the Chrome browser will change its color, providing a visual indication to the user. On the other hand, if the add-on does not detect Astro on the page, the icon will remain dark.

It's important to note that Astro Detected does not guarantee 100% accuracy in detecting Astro pages. Depending on the user's usage and specific circumstances, it is possible that Astro may leave no trace during the build process, making it difficult for the add-on to detect its presence.

Overall, Astro Detected is a useful tool for users who frequently visit Astro pages and want a quick and easy way to identify them. However, it's important to keep in mind the limitations of its detection accuracy.