After reviewing the settings, go to the cookies tab and copy the link under Search URL of the currently saved preferences:
Go to your Firefox settings in the three pointed menu
Go to general>Search>Manage alternative search engines>Add search engine
Paste the link you copied in the box called URL touse for search
Give it a name and Save it
Having added the search engine you can also make it the default if you want. You’ll be able to select it by taping the icon with the search engines while typing a search string.
Edit: Corrected the place to get the search string url
Search URL of the currently saved preferences:URL to use for searchSaveitHaving added the search engine you can also make it the default if you want. You’ll be able to select it by taping the icon with the search engines while typing a search string.
Edit: Corrected the place to get the search string url