We can easily add search engines to Mozilla Firefox.
For adding search engines to Mozilla Firefox
We have to open our Mozilla Firefox web browser and go to search box (on the upper right hand corner) and click on small arrow to open dropdown box. Then we have to click on “Manage search engines”. A new window will appear and then we have to click on “Get more search engines” link and then “Ok”. Now a new mozilla window will open and we can select the search engine, we want to add. Then we have to click on “Add to Firefox”. Mozilla Firefox will automatically add the search engine we have selected.