--- a/toolkit/components/extensions/parent/ext-browserSettings.js
+++ b/toolkit/components/extensions/parent/ext-browserSettings.js
@@ -164,16 +164,26 @@ ExtensionPreferencesManager.addSetting("
     "browser.search.openintab",
   ],
 
   setCallback(value) {
     return {[this.prefNames[0]]: value};
   },
 });
 
+ExtensionPreferencesManager.addSetting("openUrlbarResultsInNewTabs", {
+  prefNames: [
+    "browser.urlbar.openintab",
+  ],
+
+  setCallback(value) {
+    return {[this.prefNames[0]]: value};
+  },
+});
+
 ExtensionPreferencesManager.addSetting("proxyConfig", {
   prefNames: [
     "network.proxy.type",
     "network.proxy.http",
     "network.proxy.http_port",
     "network.proxy.share_proxy_settings",
     "network.proxy.ftp",
     "network.proxy.ftp_port",
@@ -320,16 +330,21 @@ this.browserSettings = class extends Ext
           () => {
             return Services.prefs.getBoolPref("browser.tabs.loadBookmarksInTabs");
           }),
         openSearchResultsInNewTabs: getSettingsAPI(
           extension, "openSearchResultsInNewTabs",
           () => {
             return Services.prefs.getBoolPref("browser.search.openintab");
           }),
+        openUrlbarResultsInNewTabs: getSettingsAPI(
+          extension, "openUrlbarResultsInNewTabs",
+          () => {
+            return Services.prefs.getBoolPref("browser.urlbar.openintab");
+          }),
         proxyConfig: Object.assign(
           getSettingsAPI(
             extension, "proxyConfig",
             () => {
               let prefValue = Services.prefs.getIntPref("network.proxy.type");
               let proxyConfig = {
                 proxyType:
                   Array.from(

--- a/toolkit/components/extensions/schemas/browser_settings.json
+++ b/toolkit/components/extensions/schemas/browser_settings.json
@@ -144,16 +144,20 @@
       "openBookmarksInNewTabs": {
         "$ref": "types.Setting",
         "description": "This boolean setting controls whether bookmarks are opened in the current tab or in a new tab."
       },
       "openSearchResultsInNewTabs": {
         "$ref": "types.Setting",
         "description": "This boolean setting controls whether search results are opened in the current tab or in a new tab."
       },
+      "openUrlbarResultsInNewTabs": {
+        "$ref": "types.Setting",
+        "description": "This boolean setting controls whether urlbar results are opened in the current tab or in a new tab."
+      },
       "proxyConfig": {
         "$ref": "types.Setting",
         "description": "Configures proxy settings. This setting's value is an object of type ProxyConfig."
       },
       "webNotificationsDisabled": {
         "$ref": "types.Setting",
         "description": "Disables webAPI notifications."
       },

--- a/toolkit/components/extensions/test/xpcshell/test_ext_browserSettings.js
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_browserSettings.js
@@ -206,16 +206,23 @@ add_task(async function test_browser_set
   await testSetting(
     "openSearchResultsInNewTabs", true,
     {"browser.search.openintab": true});
   await testSetting(
     "openSearchResultsInNewTabs", false,
     {"browser.search.openintab": false});
 
   await testSetting(
+    "openUrlbarResultsInNewTabs", true,
+    {"browser.urlbar.openintab": true});
+  await testSetting(
+    "openUrlbarResultsInNewTabs", false,
+    {"browser.urlbar.openintab": false});
+
+  await testSetting(
     "overrideDocumentColors", "high-contrast-only",
     {"browser.display.document_color_use": 0});
   await testSetting(
     "overrideDocumentColors", "never",
     {"browser.display.document_color_use": 1});
   await testSetting(
     "overrideDocumentColors", "always",
     {"browser.display.document_color_use": 2});