DevTools Inspector sidebar panel to outline elements
What is devtools-outliner?
devtools-outliner is a Firefox add-on that provides a DevTools Inspector sidebar panel. With devtools-outliner, users can easily outline elements in the DOM, making it convenient for developers to visually inspect and navigate through the structure of a web page.
devtools-outliner is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install devtools-outliner if you trust the publisher.
devtools-outliner has earned a fairly good reputation and likely can be trusted.