In order to eliminate a Firefox search plugin is necessary to open the dialog "Manage Search Engine List", select you want to delete and press the appropriate button.Extending Remove Searchplugin facilitates the process, let it do this directly from the search engine selector.Just open the list, right-click on the browser you want to delete and choose the option "Delete".(By the way, is it not time that this could be done without the help of extensions?). This feature was offered long ago by the extension SearchPluginHacks but was discontinued when he arrived Firefox 2.