Bug 1594521 - enable remote settings blocklist on nightly, r=mconley

Differential Revision: https://phabricator.services.mozilla.com/D52939

--HG--
extra : moz-landing-system : lando

browser/base/content/test/performance/browser_startup_mainthreadio.js

@@ -231,11 +231,6 @@ const startupPhases = {
       condition: WIN,
       stat: 1,
     },
-    {
-      path: "XCurProcD:blocklist.xml",
-      condition: WIN,
-      stat: 1,
-    },
     {
       // bug 1534745
       path: "ProfD:cookies.sqlite-journal",

modules/libpref/init/all.js

@@ -2305,6 +2305,8 @@ pref("extensions.blocklist.enabled", true);
 // OneCRL freshness checking depends on this value, so if you change it,
 // please also update security.onecrl.maximum_staleness_in_seconds.
 pref("extensions.blocklist.interval", 86400);
+// Whether to use the XML backend (true) or the remotesettings one (false).
+pref("extensions.blocklist.useXML", false);
 // Required blocklist freshness for OneCRL OCSP bypass
 // (default is 1.25x extensions.blocklist.interval, or 30 hours)
 pref("security.onecrl.maximum_staleness_in_seconds", 108000);

toolkit/mozapps/extensions/Blocklist.jsm

@@ -3239,7 +3239,7 @@ XPCOMUtils.defineLazyPreferenceGetter(
   Blocklist,
   "useXML",
   "extensions.blocklist.useXML",
-  true,
+  false,
   () => Blocklist.onUpdateImplementation(true)
 );