This is a great extension without which I wouldn't use Firefox. Thanks so much for it. There's one additional feature I'd love to see, though, which is in the similar 'Selection search' extension for Chrome. In that, in the list of search engines in the options, as well as new search engines one can add submenus and drag some of the search engines into them. In use, the submenus show up in the popup as folder symbols, and on moving the mouse over one of these folders (NOT clicking on it, just hovering over it) a further popup opens on top of the main popup containing the search engines that were put into the submenus in the Options. So, for example, my main popup contains the copy and launch URL, Google, Wikipedia, IMDB etc, but also 3 folders, one of which on mouseover opens a further popup of dictionaries, another of shopping site searches etc. This makes the main popup more reasonable in size and finding things easier than with this extension in Firefox where my Swift Selection Search has all the same search engines configured but the popup contains ALL of them as a mass of icons in a large popup. SO it would be great if you could add this feature. (Note that the engines put in a submenu both appear on mouseover of a folder in the popup, and appear in submenus in the context menu, if display in context menu is also selected.)