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diff --git a/browser/components/newtab/lib/SearchShortcuts.sys.mjs b/browser/components/newtab/lib/SearchShortcuts.sys.mjs
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+++ b/browser/components/newtab/lib/SearchShortcuts.sys.mjs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// List of sites we match against Topsites in order to identify sites
+// that should be converted to search Topsites
+export const SEARCH_SHORTCUTS = [
+  { keyword: "@amazon", shortURL: "amazon", url: "https://amazon.com" },
+  { keyword: "@\u767E\u5EA6", shortURL: "baidu", url: "https://baidu.com" },
+  { keyword: "@google", shortURL: "google", url: "https://google.com" },
+  {
+    keyword: "@\u044F\u043D\u0434\u0435\u043A\u0441",
+    shortURL: "yandex",
+    url: "https://yandex.com",
+  },
+];
+
+// These can be added via the editor but will not be added organically
+export const CUSTOM_SEARCH_SHORTCUTS = [
+  ...SEARCH_SHORTCUTS,
+  { keyword: "@bing", shortURL: "bing", url: "https://bing.com" },
+  {
+    keyword: "@duckduckgo",
+    shortURL: "duckduckgo",
+    url: "https://duckduckgo.com",
+  },
+  { keyword: "@ebay", shortURL: "ebay", url: "https://ebay.com" },
+  { keyword: "@twitter", shortURL: "twitter", url: "https://twitter.com" },
+  {
+    keyword: "@wikipedia",
+    shortURL: "wikipedia",
+    url: "https://wikipedia.org",
+  },
+];
+
+// Note: you must add the activity stream branch to the beginning of this if using outside activity stream
+export const SEARCH_SHORTCUTS_EXPERIMENT =
+  "improvesearch.topSiteSearchShortcuts";
+
+export const SEARCH_SHORTCUTS_SEARCH_ENGINES_PREF =
+  "improvesearch.topSiteSearchShortcuts.searchEngines";
+
+export const SEARCH_SHORTCUTS_HAVE_PINNED_PREF =
+  "improvesearch.topSiteSearchShortcuts.havePinned";
+
+export function getSearchProvider(candidateShortURL) {
+  return (
+    SEARCH_SHORTCUTS.filter(match => candidateShortURL === match.shortURL)[0] ||
+    null
+  );
+}
+
+// Get the search form URL for a given search keyword. This allows us to pick
+// different tippytop icons for the different variants. Sush as yandex.com vs. yandex.ru.
+// See more details in bug 1643523.
+export async function getSearchFormURL(keyword) {
+  const engine = await Services.search.getEngineByAlias(keyword);
+  return engine?.wrappedJSObject._searchForm;
+}
+
+// Check topsite against predefined list of valid search engines
+// https://searchfox.org/mozilla-central/rev/ca869724246f4230b272ed1c8b9944596e80d920/toolkit/components/search/nsSearchService.js#939
+export async function checkHasSearchEngine(keyword) {
+  return (await Services.search.getAppProvidedEngines()).find(
+    e => e.aliases.includes(keyword) && !e.hidden
+  );
+}