Bug 1874464 - Turn on native HTTPS-RR DNS resolver on Nightly r=necko-reviewers,kershaw

Differential Revision: https://phabricator.services.mozilla.com/D198437

modules/libpref/init/StaticPrefList.yaml

@@ -12225,7 +12225,11 @@
 # Use platform DNS APIs (where available) to resolve HTTPS queries
 - name: network.dns.native_https_query
   type: RelaxedAtomicBool
+#if defined(NIGHTLY_BUILD) && !defined(XP_MACOSX)
+  value: true
+#else
   value: false
+#endif
   mirror: always
 
 # DnsQuery_A is broken for HTTPS queries on Windows 10.

netwerk/test/unit/xpcshell.toml

@@ -35,9 +35,11 @@ support-files = [
 # https://bugzilla.mozilla.org/show_bug.cgi?id=1816325
 # Several tests rely on redirecting to data: URIs, which was allowed for a long
 # time but now forbidden. So we enable it just for these tests.
+# Native HTTPS query changes timings for some tests. Disable it for now.
 prefs = [
   "dom.serviceWorkers.enabled=true",
- "network.allow_redirect_to_data=true",
+  "network.allow_redirect_to_data=true",
+  "network.dns.native_https_query=false",
 ]
 
 ["test_1073747.js"]