diff --git a/browser/components/search/extensions/list.json b/browser/components/search/extensions/list.json
index d023e0a..15ee5f5 100644
--- a/browser/components/search/extensions/list.json
+++ b/browser/components/search/extensions/list.json
@@ -1,53 +1,29 @@
 {
   "default": {
-    "searchDefault": "Google",
-    "searchOrder": ["Google", "Bing"],
     "visibleDefaultEngines": [
       "google-b-d", "amazondotcom", "bing", "ddg", "ebay", "wikipedia"
     ]
   },
   "regionOverrides": {
     "US": {
-      "google-b-d": "google-b-1-d"
     },
     "CA": {
-      "ebay": "ebay-ca",
-      "ebay-fr": "ebay-ca",
-      "amazondotcom": "amazon-ca",
-      "amazon-france": "amazon-ca"
     },
     "AT": {
-      "ebay-de": "ebay-at"
     },
     "AU": {
-      "ebay": "ebay-au",
-      "ebay-uk": "ebay-au",
-      "amazondotcom": "amazon-au",
-      "amazon-en-GB": "amazon-au"
     },
     "BE": {
-      "ebay": "ebay-be",
-      "ebay-nl": "ebay-be",
-      "ebay-fr": "ebay-be"
     },
     "CH": {
-      "ebay": "ebay-ch",
-      "ebay-de": "ebay-ch",
-      "ebay-fr": "ebay-ch"
     },
     "FR": {
-      "amazondotcom": "amazon-france"
     },
     "IE": {
-      "ebay": "ebay-ie",
-      "ebay-uk": "ebay-ie"
     },
     "NL": {
-      "ebay": "ebay-nl"
     },
     "GB": {
-      "ebay": "ebay-uk",
-      "amazondotcom": "amazon-en-GB"
     }
   },
   "locales": {
@@ -56,35 +32,6 @@
         "visibleDefaultEngines": [
           "google-b-d", "amazondotcom", "bing", "ddg", "ebay", "wikipedia"
         ]
-      },
-      "KZ": {
-        "visibleDefaultEngines": [
-          "amazondotcom", "bing", "google-b-d", "wikipedia", "ddg", "yandex-en"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "BY": {
-        "visibleDefaultEngines": [
-          "amazondotcom", "bing", "google-b-d", "wikipedia", "ddg", "yandex-en"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "RU": {
-        "visibleDefaultEngines": [
-          "amazondotcom", "bing", "google-b-d", "wikipedia", "ddg", "yandex-en"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "TR": {
-        "visibleDefaultEngines": [
-          "amazondotcom", "bing", "google-b-d", "wikipedia", "ddg", "yandex-en"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "experimental-hidden": {
-        "visibleDefaultEngines": [
-          "amazon-ca", "amazon-au", "yandex-en", "google", "google-b-1-e", "google-b-e"
-        ]
       }
     },
     "ach": {
@@ -141,18 +88,6 @@
         "visibleDefaultEngines": [
           "yandex-by", "google-b-d", "ddg", "wikipedia-be", "wikipedia-be-tarask"
         ]
-      },
-      "BY": {
-        "searchDefault": "Яндекс"
-      },
-      "KZ": {
-        "searchDefault": "Яндекс"
-      },
-      "RU": {
-        "searchDefault": "Яндекс"
-      },
-      "TR": {
-        "searchDefault": "Яндекс"
       }
     },
     "bg": {
@@ -220,7 +155,6 @@
     },
     "cs": {
       "default": {
-        "searchOrder": ["Google", "Seznam"],
         "visibleDefaultEngines": [
           "google-b-d", "seznam-cz", "ddg", "heureka-cz", "mapy-cz", "wikipedia-cz"
         ]
@@ -266,35 +200,6 @@
         "visibleDefaultEngines": [
           "google-b-d", "amazon-ca", "bing", "ddg", "ebay-ca", "wikipedia"
         ]
-      },
-      "KZ": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "amazon-ca", "bing", "ddg", "ebay-ca", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "BY": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "amazon-ca", "bing", "ddg", "ebay-ca", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "RU": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "amazon-ca", "bing", "ddg", "ebay-ca", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "TR": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "amazon-ca", "bing", "ddg", "ebay-ca", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "experimental-hidden": {
-        "visibleDefaultEngines": [
-          "amazon-ca", "amazon-au", "yandex-en", "google", "google-b-1-e", "google-b-e"
-        ]
       }
     },
     "en-GB": {
@@ -302,35 +207,6 @@
         "visibleDefaultEngines": [
           "google-b-d", "bing", "amazon-en-GB", "chambers-en-GB", "ddg", "ebay-uk", "wikipedia"
         ]
-      },
-      "KZ": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "bing", "amazon-en-GB", "chambers-en-GB", "ddg", "ebay-uk", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "BY": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "bing", "amazon-en-GB", "chambers-en-GB", "ddg", "ebay-uk", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "RU": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "bing", "amazon-en-GB", "chambers-en-GB", "ddg", "ebay-uk", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "TR": {
-        "visibleDefaultEngines": [
-          "yandex-en", "google-b-d", "bing", "amazon-en-GB", "chambers-en-GB", "ddg", "ebay-uk", "wikipedia"
-        ],
-        "searchDefault": "Yandex"
-      },
-      "experimental-hidden": {
-        "visibleDefaultEngines": [
-          "yandex-en"
-        ]
       }
     },
     "eo": {
@@ -397,11 +249,6 @@
         "visibleDefaultEngines": [
           "google-b-d", "bing", "ddg", "mercadolibre-mx", "wikipedia-es"
         ]
-      },
-      "experimental-hidden": {
-        "visibleDefaultEngines": [
-          "amazon-mx"
-        ]
       }
     },
     "et": {
@@ -451,11 +298,6 @@
         "visibleDefaultEngines": [
           "google-b-d", "bing", "bolcom-fy-NL", "ddg", "ebay-nl", "marktplaats-fy-NL", "wikipedia-fy-NL"
         ]
-      },
-      "experimental-hidden": {
-        "visibleDefaultEngines": [
-          "amazon-nl"
-        ]
       }
     },
     "ga-IE": {
@@ -565,7 +407,6 @@
     },
     "ja-JP-macos": {
       "default": {
-        "searchOrder": ["Google", "Yahoo! JAPAN", "Bing", "Amazon.co.jp", "楽天市場", "ヤフオク!", "教えて！goo", "Wikipedia (ja)"],
         "visibleDefaultEngines": [
           "google-b-d", "yahoo-jp", "bing", "amazon-jp", "rakuten", "yahoo-jp-auctions", "oshiete-goo", "wikipedia-ja", "ddg"
         ]
@@ -573,7 +414,6 @@
     },
     "ja": {
       "default": {
-        "searchOrder": ["Google", "Yahoo! JAPAN", "Bing", "Amazon.co.jp", "楽天市場", "ヤフオク!", "教えて！goo", "Wikipedia (ja)"],
         "visibleDefaultEngines": [
           "google-b-d", "yahoo-jp", "bing", "amazon-jp", "rakuten", "yahoo-jp-auctions", "oshiete-goo", "wikipedia-ja", "ddg"
         ]
@@ -598,18 +438,6 @@
         "visibleDefaultEngines": [
           "yandex-kk", "google-b-d", "ddg", "flip", "wikipedia-kk"
         ]
-      },
-      "KZ": {
-        "searchDefault": "Яндекс"
-      },
-      "BY": {
-        "searchDefault": "Яндекс"
-      },
-      "RU": {
-        "searchDefault": "Яндекс"
-      },
-      "TR": {
-        "searchDefault": "Яндекс"
       }
     },
     "km": {
@@ -729,11 +557,6 @@
         "visibleDefaultEngines": [
           "google-b-d", "bing", "bolcom-nl", "ddg", "ebay-nl", "marktplaats-nl", "wikipedia-nl"
         ]
-      },
-      "experimental-hidden": {
-        "visibleDefaultEngines": [
-          "amazon-nl"
-        ]
       }
     },
     "nn-NO": {
@@ -804,18 +627,6 @@
         "visibleDefaultEngines": [
           "yandex-ru", "google-b-d", "ddg", "ozonru", "priceru", "wikipedia-ru", "mailru"
         ]
-      },
-      "RU": {
-        "searchDefault": "Яндекс"
-      },
-      "BY": {
-        "searchDefault": "Яндекс"
-      },
-      "KZ": {
-        "searchDefault": "Яндекс"
-      },
-      "TR": {
-        "searchDefault": "Яндекс"
       }
     },
     "si": {
@@ -900,18 +711,6 @@
         "visibleDefaultEngines": [
           "yandex-tr", "google-b-d", "ddg", "wikipedia-tr"
         ]
-      },
-      "TR": {
-        "searchDefault": "Yandex"
-      },
-      "BY": {
-        "searchDefault": "Yandex"
-      },
-      "KZ": {
-        "searchDefault": "Yandex"
-      },
-      "RU": {
-        "searchDefault": "Yandex"
       }
     },
     "trs": {
@@ -968,9 +767,6 @@
         "visibleDefaultEngines": [
           "baidu", "google-b-d", "bing", "ddg", "wikipedia-zh-CN", "amazondotcn"
         ]
-      },
-      "CN": {
-        "searchDefault": "百度"
       }
     },
     "zh-TW": {