Rated 4 out of 5 stars

A good addon. This is the only addon that does what it does. But, I think it can be improved further if some of the following ideas are incorporated:
(1) Close new tabs after a certain amount of time, say 15s, 30s, 1 min, 2min etc..
(2) Close newtabs only when the number of tabs exceeds x i.e 10 tabs, 20 tabs and so on.
(3) Close newtab only if you have switched to it twice and done nothing.

If the developer somehow manages to use all of these ideas, this will become an irresistible addon.