Bug 1352204 Disallow non-MPC extensions on Nightly r=kmag

MozReview-Commit-ID: D1TrIrrwGcL

--HG--
extra : rebase_source : 403adbeab03e063cfa235018b0fa3390cf72e774

browser/app/profile/firefox.js

@@ -1517,6 +1517,11 @@ pref("browser.tabs.crashReporting.email", "");
 pref("extensions.interposition.enabled", true);
 pref("extensions.interposition.prefetching", true);
 
+// But don't allow non-MPC extensions by default on Nightly
+#if defined(NIGHTLY_BUILD)
+pref("extensions.allow-non-mpc-extensions", false);
+#endif
+
 // Enable blocking of e10s and e10s-multi for add-on users on beta/release.
 #ifdef RELEASE_OR_BETA
 pref("extensions.e10sBlocksEnabling", true);

toolkit/mozapps/extensions/internal/XPIProvider.jsm

@@ -184,7 +184,7 @@ const TOOLKIT_ID                      = "toolkit@mozilla.org";
 
 const XPI_SIGNATURE_CHECK_PERIOD      = 24 * 60 * 60;
 
-XPCOMUtils.defineConstant(this, "DB_SCHEMA", 19);
+XPCOMUtils.defineConstant(this, "DB_SCHEMA", 20);
 
 XPCOMUtils.defineLazyPreferenceGetter(this, "ALLOW_NON_MPC", PREF_ALLOW_NON_MPC);