It would be nice if the Data Manager tab had its own icon, just like Add-ons Manager also does. I have a patch ready in my add-on work to do this.
Created attachment 493467 [details] [diff] [review] v1: add an icon And here's the pretty easy patch - the only obstacle is that CSS rule that is needed to not come out with very strange results.
Created attachment 493472 [details] [diff] [review] v1.1: use correct URL Apparently that was too trivial for me - SeaMonkey of course has a different chrome URL than my add-on ;-)
Comment on attachment 493472 [details] [diff] [review] v1.1: use correct URL I think something like datamanIcon-16.png would be a better name, but not going to fall out over it.
Pushed as http://hg.mozilla.org/comm-central/rev/3108d458109f with the icon name change.