A tweak and docs would help Rated 4 out of 5 stars

So far I like this AddOn. I would agree with the poster who suggested it needs a command for "Select All" and "Deselect All" as checking a dozen boxes gets old fast. Also there's no explanation how to do Categories. Some kind of usage info would make life a lot easier. The only thing that seems like a bug or flaw is it seems to overwrite the current tab in the browser. IOW, if I have 3 search engines checked, only 2 tabs are added. I have to remember which tab was overwritten so I can back button to it later.