ChromeStrap is a free browser add-on developed by WiredUK that caters specifically to Bootstrap developers. This handy tool displays a popup window indicating the current Bootstrap 3 breakpoint when you resize your browser window.

With ChromeStrap, developers can easily identify the breakpoints and ensure that their websites or applications are responsive across different devices and screen sizes. The add-on provides a convenient way to visualize and test the responsiveness of your Bootstrap projects.

In terms of features, ChromeStrap allows users to toggle the extension on or off, whitelist or blacklist specific sites where the extension should or shouldn't work, and displays the current Bootstrap breakpoint in the toolbar icon. This makes it easy for developers to see which breakpoint they are currently on without any hassle.

Overall, ChromeStrap is a valuable tool for Bootstrap developers who want to streamline their workflow and ensure optimal responsiveness of their projects. It offers a simple and intuitive solution for identifying and testing breakpoints, making it a must-have add-on for anyone working with Bootstrap.