These searches were added from individual sites through the search bar at the top of the FF browser. It was just that the search was highlighted and you poked at it and it was added. And also add the function of renaming search engines that are added from individual sites. It's just inconvenient when you install a search engine from a separate site and from another you also install and poke in the search bar in the feed and the FF browser says that this search engine has been added, but it is necessary that the FF browser rename the search engine.
