An extension to honor the 43 Mexican students (and all others) who "disappeared," the 43 extension for Chrome aims to raise awareness about this tragic event. Developed by rodrigoderteano, this free extension is categorized under Browsers and falls under the Add-ons & Tools subcategory.

The 43 extension works by appropriating the number 43 on every website you visit. It adds a cross symbol after the number and converts it into a clickable link to various sites related to the incident, whenever the HTML structure allows it. This serves as a constant reminder of the missing students and helps redirect users to relevant resources and information.

However, it's important to note that the extension may have some unexpected errors during navigation. In such cases, it is recommended to deactivate the extension and try again. While the extension is not perfect, its purpose is to honor and remember the 43 Mexican students and create awareness about their disappearance.