esa鮮度 is a Chrome extension that allows users to easily determine whether an article on esa is outdated or not. By installing this extension, users can quickly see the elapsed time since the last update of the article they are currently viewing.

This extension adds a temporary warning message to esa articles that have been updated for a longer period than the specified timeframe. It's important to note that this warning message is temporary and does not modify the content of the article in any way. For example, please refer to the provided screenshot to see how the warning message appears.

By default, articles that have not been updated for more than a year are considered outdated. However, users can customize this timeframe by accessing the extension's settings. It is possible to set the extension to show warnings for articles that have not been updated for more than 10 years, or even articles that have not been updated for more than a minute. This flexibility allows users to tailor the extension to their own definition of outdated articles, ensuring a more comfortable browsing experience.