Thanks, going to try this at work. So far I had used tab group names for short comments, but it's not great in those cases where I have a group of tabs for one topic and want to remember that one tab has open todos and another is waiting for a blocker etc.

I've found that the easiest way to live debug userChrome.css is to:

1. Open the browser toolbox,
2. Go to the style editor tab,
3. Write userChrome in the search box to find it,
4. Write CSS directly into the browser toolbox integrated editor.

The integrated editor reloads CSS changes as you write, even without saving.