It sounds like a frustrating issue with Firefox’s Web Developer Tools. The extra empty lines in the CSS are likely being inserted by Firefox’s internal rendering, which can make debugging difficult, especially when trying to match up line numbers with the original CSS file. One approach you could try is to use a different browser’s developer tools (like Chrome or Edge) to see if they display the CSS without the extra lines. Alternatively, using a text editor with built-in developer tools could also help avoid this issue. If you need to stick with Firefox, another workaround could be adding comments in your CSS to mark specific sections, which might make it easier to locate the corresponding lines. Hopefully, a future update to Firefox will resolve this behavior, but in the meantime, these steps might help mitigate the issue.