I have been using the Firefox Page Inspector lately to see how it compares to Firebug. I noticed that if you disable a CSS rule by unchecking the checkbox next to it, it is still shown in the inspector, so you can check the box again and reenable it. However, if I click some other element, and then come back to the previous one, I found that the CSS rule seems to have been deleted entirely i.e. there is no checkbox for me to check to reenable that rule.

This is a pretty major problem for me, as Firebug and Chrome's inspector both remember rules you have disabled and give you the options of reenabling them again later, even if you click a different element. Is it a problem with my particular installation of firefox, or is it just a bug with the inspector?