Great add-on Rated 4 out of 5 stars
I've been using it for quite some time now and it is just great. I can't imagine browsing now without your add-on.
It has just one minus, you cannot export the definitions list.
I have thought of that - it wouldn't be hard to do. However, what would you export to, and why?
I am keen to keep the extension to what is needed, without too much duplication of effort. Have you tried OPIE? It's able to export and import settings from all of your extensions, in one handy package!