--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -1189,26 +1189,28 @@ pref("browser.taskbar.lists.refreshInSec
 #endif
 
 // Preferences to be synced by default
 pref("services.sync.prefs.sync.accessibility.blockautorefresh", true);
 pref("services.sync.prefs.sync.accessibility.browsewithcaret", true);
 pref("services.sync.prefs.sync.accessibility.typeaheadfind", true);
 pref("services.sync.prefs.sync.accessibility.typeaheadfind.linksonly", true);
 pref("services.sync.prefs.sync.addons.ignoreUserEnabledChanges", true);
+pref("services.sync.prefs.sync.app.shield.optoutstudies.enabled", true);
 // The addons prefs related to repository verification are intentionally
 // not synced for security reasons. If a system is compromised, a user
 // could weaken the pref locally, install an add-on from an untrusted
 // source, and this would propagate automatically to other,
 // uncompromised Sync-connected devices.
 pref("services.sync.prefs.sync.browser.contentblocking.category", true);
 pref("services.sync.prefs.sync.browser.contentblocking.features.strict", true);
 pref("services.sync.prefs.sync.browser.contentblocking.introCount", true);
 pref("services.sync.prefs.sync.browser.crashReports.unsubmittedCheck.autoSubmit2", true);
 pref("services.sync.prefs.sync.browser.ctrlTab.recentlyUsedOrder", true);
+pref("services.sync.prefs.sync.browser.discovery.enabled", true);
 pref("services.sync.prefs.sync.browser.download.useDownloadDir", true);
 pref("services.sync.prefs.sync.browser.formfill.enable", true);
 pref("services.sync.prefs.sync.browser.link.open_newwindow", true);
 pref("services.sync.prefs.sync.browser.newtabpage.activity-stream.showSearch", true);
 pref("services.sync.prefs.sync.browser.newtabpage.activity-stream.feeds.topsites", true);
 pref("services.sync.prefs.sync.browser.newtabpage.activity-stream.topSitesRows", true);
 pref("services.sync.prefs.sync.browser.newtabpage.activity-stream.feeds.snippets", true);
 pref("services.sync.prefs.sync.browser.newtabpage.activity-stream.feeds.section.topstories", true);