Regex Finder, a Chrome extension developed by ile66fi, is a powerful search tool utilizing the CSS Custom Highlight API. This tool is designed for advanced users familiar with regex matching. By entering a valid regex in the search field, users can highlight matches on both dynamic and static web pages. The extension provides a straightforward functionality, highlighting matches with a red background color and displaying the total match count to the user.

To use Regex Finder, simply navigate to a webpage and click the extension icon. Enter a valid regex and press Enter or the Find button to initiate the matching process. Users can easily navigate through matches using Next and Prev buttons, with the option to restart the search by pressing Enter or Find again. The extension also includes a Stop button to remove highlights and halt program execution if needed.