It is almost perfect except a few UX issues.

Useful. Used it to add "body {overflow-x: hidden}" to a site I use frequently. UI could be nice but it does the job.

Absolutely annoying how it doesn't alert you if you accidentally press the delete button. But other than some other minor things like how it doesn't support reading local files so you don't have type directly or paste your changes to the page, it works pretty well.

The UX is sometimes a little bit borderline but overall the addon does what it should. Thank you very much!

very good user interface.. loved it..

Couldn't do it without ya.... Thanks