I am an African Librarian working to promote the place of libraries in developing Africa. Libraries bridge the gap between the have and have-nots in the society as they provide equitable access to information resources to every member of their user communities that are essential for inculcation of literacy, opportunities for a better life and lifelong learning among other benefits. Building the capacity of African librarians and situating their libraries to offer relevant services that answer directly to the development challenges of their user communities is my passion.
In Firefox, the search box has a little pull down menu to allow you to choose which search engine it uses. Several popular search engines come included, but not Wikipedia. However, Firefox provides a page on their website listing more search engines you can add to that menu, including Wikipedia's search. To add Wikipedia, simply go here and click on Wikipedia in the list provided, and you are done. To activate it, pull-down the menu at the search box and click on Wikipedia there. Now you have a second Wikipedia search box. Unlike the search box in Wikipedia's sidebar, which disappears off the screen when you scroll down to read a long page, the Firefox search box always remains on the screen, ready to assist. (Keep in mind, typing Alt+F also places the cursor in the Wikipedia search box.)