Need to add another search to your search box in Firefox - but don’t know how to create it by hand? No worries there, this should solve the problem ASAP.
The Add To Search Bar extension lets you right-click on any search box and it will give you an option to add that site’s search field to the search box. The quick 3-step process of adding a search field can be seen in the screen shot that I took above and you’ll notice that you can customize the icon that is associated with a search.
+ Read More About Adding Any Search Field to Firefox’s Search Box!
