Knockout Context Hover is a browser extension for developers of Knockout JS, a JavaScript library for developing interactive web applications. You can use the extension to test your applications or web pages that use the Knockout JS library.

The extension provides a panel that displays information about the selected element on the page when the mouse pointer is placed on it. This panel can be activated by right-clicking the page and selecting the "KO Context Hover" option. The panel will display the following information: the element's ID, classes, text content, HTML content, attributes, parent element, and a reference to the knockout variable that was used to create the element.

You can also access the same information from the panel's menu.