Bug 1460478 - Remove support for AppCache in stable. r=baku

MozReview-Commit-ID: D3NDCWKIA5n

--HG--
extra : rebase_source : 79a60c1d334b3c701225787d47fe76d0d8b92419

dom/tests/mochitest/general/test_interfaces.js

@@ -735,7 +735,7 @@ var interfaceNamesInGlobalScope =
 // IMPORTANT: Do not change this list without review from a DOM peer!
     {name: "OfflineAudioContext", insecureContext: true},
 // IMPORTANT: Do not change this list without review from a DOM peer!
-    {name: "OfflineResourceList", insecureContext: !isEarlyBetaOrEarlier},
+    {name: "OfflineResourceList", insecureContext: false},
 // IMPORTANT: Do not change this list without review from a DOM peer!
     {name: "Option", insecureContext: true},
 // IMPORTANT: Do not change this list without review from a DOM peer!

modules/libpref/init/all.js

@@ -82,13 +82,8 @@ pref("browser.cache.max_shutdown_io_lag", 2);
 
 pref("browser.cache.offline.enable",           true);
 
-// Nightly and Early Beta will have AppCache disabled by default
-// Stable will remain enabled until Firefox 62.
-#ifdef EARLY_BETA_OR_EARLIER
+// AppCache over insecure connection is disabled by default
 pref("browser.cache.offline.insecure.enable",  false);
-#else
-pref("browser.cache.offline.insecure.enable",  true);
-#endif
 
 // enable offline apps by default, disable prompt
 pref("offline-apps.allow_by_default",          true);