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Excellent Rated 5 out of 5 stars
I have this habit of opening far too many tabs and I tend to not realize just how many tabs I have open.
This add-on is very useful to help me realize I am opening too many tabs. Infact, I wondered why firefox was running laggy and I noticed I had alot of tabs open so I installed this addon. It turns out I had 447 (that is four hundred and forty seven) tabs open!