JScript tricks is a free Chrome add-on developed by szamil that allows users to inject their own JavaScript and CSS code to any webpage. With a nice editor powered by CodeMirror, users can easily write and apply their scripts and styles after the page is loaded. The app also includes features such as auto-save to cache, automatic JQuery injection, custom JavaScript and CSS injection, and a popup for quick editing and applying tricks.

One of the standout features of JScript tricks is the ability to export and import scripts to and from text files, making it easy to share and collaborate with others. The app also provides a default script for all pages, an options interface for easy customization, and a helpful F1 JQuery help feature. Keyboard shortcuts like Ctrl+S for saving and Ctrl+Alt+H for hidden tricks enhance the user experience.

While JScript tricks offers a powerful tool for injecting JavaScript and CSS, there are some known bugs, particularly with applying certain CSS styles. However, the app provides a workaround by using a specific syntax to apply the styles correctly. If you encounter any bugs or have suggestions for new features, the developer encourages users to reach out and provide feedback.

Overall, JScript tricks is a useful and versatile add-on for Chrome users who want to customize and enhance their browsing experience by injecting their own JavaScript and CSS code.