祭止兀 is a free Chrome extension developed by lyenliang. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools. This extension allows users to replace the name "蔡正元" with "祭止兀" on the Facebook platform.

With 蔡正元 being a name that consists of many strokes, this extension provides a convenient way to replace it with the simpler name "祭止兀" on Facebook. This can be particularly useful for users who prefer the alternative name or simply find it easier to read and type.

Overall, 祭止兀 Chrome Extension offers a straightforward solution for replacing the name "蔡正元" with "祭止兀" on Facebook, providing users with a more convenient and personalized browsing experience.