Firefox addon for searching with different search engines

Question

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.

Answer 1

Context Search

Expands the context menu's 'Search for' item into a list of installed search engines, allowing you to choose the engine you want to use for each search.

SearchWith

SearchWith extension allows you to search selected with various search services. It adds a "Search With" sub menu on the context menu (right-click menu) with a configurable list of search services that can be used to search the highlighted text.

SmartSearch

Right-click on a word or group of selected words, and from the popup menu, select a website. SmartSearch will perform a search as though you had gone to that website and entered the selected words. You may add any website to the menu by visiting that site, right-clicking on its search field, selecting "Add a Keyword for this Search..." and picking a name and keyword.

Answer 2

Another link for completeness: "Add to Search Bar".