Code viewer - uBlockOrigin/uBlock-issues GitHub Wiki

See:

Investigating filter issues can be a serious time sink, and to help with this, a code viewer has been added to uBO. The code viewer will automatically beautify HTML/CSS/JS code, which should be an improvement over the browser built-in view-source tool.

You can view beautified source code of HTML/CSS/JS resources when clicking the link in a logger entry. Additionally, if the advanced setting filterAuthorMode is set to true, an entry labelled View source code... will be added to the context menu, so that you can view the source code of any page/resource without having to open the logger.