I want to be able to right click on the selected text and, instead of Search Google for [whatever is selected], I want to have a submenu that allows me to choose the search engine I want. The list of search engines has to be the exact list of search engines I have. I know there is such an add-on, because I've used something like this in the past, only I can't remember its name.
Firefox addon for searching with different search engines
browser-addonscontext menufirefoxsearch
Best Answer
Context Search
The following addons appear to have since been deleted.
SearchWith (no longer avaliable)
SmartSearch (no longer avaliable)