Rated 4 out of 5 stars

I really like it. The only thing is Greasemonkey doesn't show when add-ons is open. I'm not sure that's even something that could be fixed but if you could that would be great. Thanks.

This review is for a previous version of the add-on (0.8.1.1-signed). 

It looks like this is caused by the 'document.getElementById("categories");' at the bottom of change_default_view.xul. With that line, Greasemonkey decides not to add itself to the list. Without that line, if you close the AM with the search tab selected, it loads addons://updates/available rather than the default tab. Bizarre. (That line isn't even supposed to do anything!)

I will try and fix this properly, but for now the workarounds are either to pick "Manage User Scripts" from the GM menu/toolbar icon, or to use Scriptish instead.