Bug 1243034 - Sync "browser.download.useDownloadDir" preference added. r=markh

browser/app/profile/firefox.js

@@ -1014,6 +1014,7 @@ pref("services.sync.prefs.sync.addons.ignoreUserEnabledChanges", true);
 // 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.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.enabled", true);