--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -313,17 +313,17 @@ pref("browser.urlbar.restrict.searches",
 pref("browser.urlbar.match.title", "#");
 pref("browser.urlbar.match.url", "@");
 
 // The default behavior for the urlbar can be configured to use any combination
 // of the match filters with each additional filter adding more results (union).
 pref("browser.urlbar.suggest.history",              true);
 pref("browser.urlbar.suggest.bookmark",             true);
 pref("browser.urlbar.suggest.openpage",             true);
-pref("browser.urlbar.suggest.searches",             false);
+pref("browser.urlbar.suggest.searches",             true);
 pref("browser.urlbar.userMadeSearchSuggestionsChoice", false);
 // The suggestion opt-in notification will be shown on 4 different days.
 pref("browser.urlbar.daysBeforeHidingSuggestionsPrompt", 4);
 pref("browser.urlbar.lastSuggestionsPromptDate", 20160601);
 // The suggestion opt-out hint will be hidden after being shown 4 times.
 pref("browser.urlbar.timesBeforeHidingSuggestionsHint", 4);
 
 // Limit the number of characters sent to the current search engine to fetch

--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@@ -578,31 +578,16 @@ BrowserGlue.prototype = {
 
     // apply distribution customizations
     // prefs are applied in _onAppDefaults()
     this._distributionCustomizer.applyCustomizations();
 
     // handle any UI migration
     this._migrateUI();
 
-    // This is support code for the location bar search suggestions; passing
-    // from opt-in to opt-out should respect the user's choice, thus we need
-    // to cache that choice in a pref for future use.
-    // Note: this is not in migrateUI because we need to uplift it. This
-    // code is also short-lived, since we can remove it as soon as opt-out
-    // search suggestions shipped in release (Bug 1344928).
-    try {
-      let urlbarPrefs = Services.prefs.getBranch("browser.urlbar.");
-      if (!urlbarPrefs.prefHasUserValue("searchSuggestionsChoice") &&
-          urlbarPrefs.getBoolPref("userMadeSearchSuggestionsChoice")) {
-        urlbarPrefs.setBoolPref("searchSuggestionsChoice",
-                                urlbarPrefs.getBoolPref("suggest.searches"));
-      }
-    } catch (ex) { /* missing any of the prefs is not critical */ }
-
     listeners.init();
 
     PageThumbs.init();
 
     DirectoryLinksProvider.init();
     NewTabUtils.init();
     NewTabUtils.links.addProvider(DirectoryLinksProvider);
     AboutNewTab.init();
@@ -1688,17 +1673,17 @@ BrowserGlue.prototype = {
         return;
       this._openPreferences("sync", { origin: "doorhanger" });
     }
     AlertsService.showAlertNotification(null, title, body, true, null, clickCallback);
   },
 
   // eslint-disable-next-line complexity
   _migrateUI: function BG__migrateUI() {
-    const UI_VERSION = 45;
+    const UI_VERSION = 46;
     const BROWSER_DOCURL = "chrome://browser/content/browser.xul";
 
     let currentUIVersion;
     if (Services.prefs.prefHasUserValue("browser.migration.version")) {
       currentUIVersion = Services.prefs.getIntPref("browser.migration.version");
     } else {
       // This is a new profile, nothing to migrate.
       Services.prefs.setIntPref("browser.migration.version", UI_VERSION);
@@ -1991,16 +1976,32 @@ BrowserGlue.prototype = {
       const LEGACY_PREF = "browser.shell.skipDefaultBrowserCheck";
       if (Services.prefs.prefHasUserValue(LEGACY_PREF)) {
         Services.prefs.setBoolPref("browser.shell.didSkipDefaultBrowserCheckOnFirstRun",
                                    !Services.prefs.getBoolPref(LEGACY_PREF));
         Services.prefs.clearUserPref(LEGACY_PREF);
       }
     }
 
+    if (currentUIVersion < 46) {
+      // Search suggestions are now on by default.
+      // For privacy reasons, we want to respect previously made user's choice
+      // regarding the feature, so if it's known reflect that choice into the
+      // current pref.
+      // Note that in case of downgrade/upgrade we won't guarantee anything.
+      try {
+        Services.prefs.setBoolPref(
+          "browser.urlbar.suggest.searches",
+          Services.prefs.getBoolPref("browser.urlbar.searchSuggestionsChoice")
+        );
+      } catch (ex) {
+        // The pref is not set, nothing to do.
+      }
+    }
+
     // Update the migration version.
     Services.prefs.setIntPref("browser.migration.version", UI_VERSION);
   },
 
   // ------------------------------
   // public nsIBrowserGlue members
   // ------------------------------