12 files changed, 32 insertions, 21 deletions
diff --git a/application/palemoon/modules/AboutHomeUtils.jsm b/application/palemoon/modules/AboutHomeUtils.jsm
index 1d4070eafa..72712e1f36 100644
--- a/application/palemoon/modules/AboutHomeUtils.jsm
+++ b/application/palemoon/modules/AboutHomeUtils.jsm
@@ -44,7 +44,7 @@ this.AboutHomeUtils = {
       return !Services.prefs.getBoolPref("browser.EULA.override");
     } catch (e) { }
 
-#ifndef MOZILLA_OFFICIAL
+#ifndef MC_OFFICIAL
     // Non-official builds shouldn't show the notification.
     return false;
 #endif
diff --git a/application/palemoon/modules/moz.build b/application/palemoon/modules/moz.build
index 7620b9862e..f7717ef893 100644
--- a/application/palemoon/modules/moz.build
+++ b/application/palemoon/modules/moz.build
@@ -37,5 +37,8 @@ EXTRA_PP_JS_MODULES += [
     'RecentWindow.jsm',
 ]
 
+# Pass down 'official build' flags
+if CONFIG['MC_OFFICIAL']:
+    DEFINES['MC_OFFICIAL'] = 1
 if CONFIG['MOZILLA_OFFICIAL']:
-    DEFINES['MOZILLA_OFFICIAL'] = 1
-\ No newline at end of file
+    DEFINES['MOZILLA_OFFICIAL'] = 1
diff --git a/browser/modules/AboutHome.jsm b/browser/modules/AboutHome.jsm
index 8c0fc4c157..639194c20c 100644
--- a/browser/modules/AboutHome.jsm
+++ b/browser/modules/AboutHome.jsm
@@ -47,7 +47,7 @@ this.AboutHomeUtils = {
       return !Services.prefs.getBoolPref("browser.EULA.override");
     } catch (e) { }
 
-    if (!AppConstants.MOZILLA_OFFICIAL) {
+    if (!AppConstants.MC_OFFICIAL) {
       // Non-official builds shouldn't show the notification.
       return false;
     }
diff --git a/build/autoconf/compiler-opts.m4 b/build/autoconf/compiler-opts.m4
index 5e495e1074..57a974435c 100644
--- a/build/autoconf/compiler-opts.m4
+++ b/build/autoconf/compiler-opts.m4
@@ -7,7 +7,7 @@ dnl Add compiler specific options
 AC_DEFUN([MOZ_DEFAULT_COMPILER],
 [
 dnl set DEVELOPER_OPTIONS early; MOZ_DEFAULT_COMPILER is usually the first non-setup directive
-  if test -z "$MOZILLA_OFFICIAL"; then
+  if test -z "$MC_OFFICIAL"; then
     DEVELOPER_OPTIONS=1
   fi
   MOZ_ARG_ENABLE_BOOL(release,
diff --git a/config/version.mk b/config/version.mk
index 1b9f68afa9..ef8eca9d04 100644
--- a/config/version.mk
+++ b/config/version.mk
@@ -16,7 +16,7 @@ ifndef RESFILE
 RCFILE=./module.rc
 RESFILE=./module.res
 _RC_STRING = -QUIET 1 -DEPTH $(DEPTH) -TOPSRCDIR $(MOZILLA_DIR) -OBJDIR . -SRCDIR $(srcdir) -DISPNAME $(MOZ_APP_DISPLAYNAME) -APPVERSION $(MOZ_APP_VERSION)
-ifdef MOZILLA_OFFICIAL
+ifdef MC_OFFICIAL
 _RC_STRING += -OFFICIAL 1
 endif
 ifdef MOZ_DEBUG
diff --git a/js/src/old-configure.in b/js/src/old-configure.in
index 5da81ce3ee..1736cc5d4a 100644
--- a/js/src/old-configure.in
+++ b/js/src/old-configure.in
@@ -2106,6 +2106,7 @@ AC_SUBST(MOZ_APP_VERSION)
 AC_SUBST(MOZ_PKG_SPECIAL)
 
 AC_SUBST(MOZILLA_OFFICIAL)
+AC_SUBST(MC_OFFICIAL)
 
 dnl ========================================================
 dnl ECMAScript Internationalization API Support (uses ICU)
diff --git a/old-configure.in b/old-configure.in
index 2a9e2c65f6..6e2d743d68 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -2259,7 +2259,7 @@ MOZ_ARG_HEADER(Application)
 ENABLE_SYSTEM_EXTENSION_DIRS=1
 MOZ_BRANDING_DIRECTORY=
 MOZ_OFFICIAL_BRANDING=
-MC_OFFICIAL=1
+MC_OFFICIAL=
 MOZ_FEEDS=1
 MOZ_AUTH_EXTENSION=1
 if test "$MOZ_IOS"; then
@@ -2352,10 +2352,10 @@ AC_SUBST(MOZ_ANDROID_DISTRIBUTION_DIRECTORY)
 dnl ========================================================
 dnl = Vendor override
 dnl ========================================================
-MOZ_ARG_DISABLE_BOOL(official-vendor,
-[  --disable-official-vendor   Disable the use of official vendor.],
-    MC_OFFICIAL=,
-    MC_OFFICIAL=1)
+MOZ_ARG_ENABLE_BOOL(official-vendor,
+[  --enable-official-vendor   This is an official release build.],
+    MC_OFFICIAL=1,
+    MC_OFFICIAL=)
 
 
 dnl ========================================================
@@ -2363,11 +2363,10 @@ dnl = Trademarked Branding
 dnl ========================================================
 MOZ_ARG_ENABLE_BOOL(official-branding,
 [  --enable-official-branding
-                          Enable Official mozilla.org Branding
+                          Enable Official Branding
                           Do not distribute builds with
                           --enable-official-branding unless you have
-                          permission to use trademarks per
-                          http://www.mozilla.org/foundation/trademarks/ .],
+                          permission to use our trademarks!],
     MOZ_OFFICIAL_BRANDING=1,
     MOZ_OFFICIAL_BRANDING=)
 
@@ -2587,6 +2586,7 @@ if test -n "$MOZ_OFFICIAL_BRANDING"; then
   else
     MOZ_BRANDING_DIRECTORY=${MOZ_OFFICIAL_BRANDING_DIRECTORY}
     AC_DEFINE(MOZ_OFFICIAL_BRANDING)
+dnl Using official branding implies an official release build.
     MC_OFFICIAL=1
   fi
 fi
@@ -5481,7 +5481,7 @@ AC_SUBST(MOZ_SIMPLE_PACKAGE_NAME)
 AC_SUBST(MOZILLA_OFFICIAL)
 if test "$MOZILLA_OFFICIAL"; then
     AC_DEFINE(MOZILLA_OFFICIAL)
-    # Build revisions should always be present in official builds
+    # Build revisions should always be present in official Mozilla builds
     MOZ_INCLUDE_SOURCE_INFO=1
 fi
 
diff --git a/python/mozbuild/mozbuild/mozinfo.py b/python/mozbuild/mozbuild/mozinfo.py
index 712722d62e..3e1d0a7607 100755
--- a/python/mozbuild/mozbuild/mozinfo.py
+++ b/python/mozbuild/mozbuild/mozinfo.py
@@ -90,7 +90,7 @@ def build_dict(config, env=os.environ):
     d['bin_suffix'] = substs.get('BIN_SUFFIX', '')
     d['addon_signing'] = substs.get('MOZ_ADDON_SIGNING') == '1'
     d['require_signing'] = substs.get('MOZ_REQUIRE_SIGNING') == '1'
-    d['official'] = bool(substs.get('MOZILLA_OFFICIAL'))
+    d['official'] = bool(substs.get('MC_OFFICIAL'))
     d['sm_promise'] = bool(substs.get('SPIDERMONKEY_PROMISE'))
 
     def guess_platform():
diff --git a/toolkit/content/jar.mn b/toolkit/content/jar.mn
index f9ac19a245..851c722502 100644
--- a/toolkit/content/jar.mn
+++ b/toolkit/content/jar.mn
@@ -12,7 +12,7 @@ toolkit.jar:
    content/global/about.xhtml
    content/global/aboutAbout.js
    content/global/aboutAbout.xhtml
-#ifdef MOZILLA_OFFICIAL
+#ifdef MC_OFFICIAL
    content/global/aboutRights.xhtml
 #else
    content/global/aboutRights.xhtml           (aboutRights-unbranded.xhtml)
diff --git a/toolkit/modules/AppConstants.jsm b/toolkit/modules/AppConstants.jsm
index 93acea0ec5..2b18f3c1aa 100644
--- a/toolkit/modules/AppConstants.jsm
+++ b/toolkit/modules/AppConstants.jsm
@@ -36,11 +36,18 @@ this.AppConstants = Object.freeze({
   false,
 #endif
 
-  // Official corresponds, roughly, to whether this build is performed
-  // on Mozilla's continuous integration infrastructure. You should
+  // Official corresponds to whether this build is considered an
+  // official, branded release for the public. You should
   // disable developer-only functionality when this flag is set.
+  // MOZILLA_OFFICIAL is deprecated but kept for extension compatibility.
   MOZILLA_OFFICIAL:
-#ifdef MOZILLA_OFFICIAL
+#ifdef MC_OFFICIAL
+  true,
+#else
+  false,
+#endif
+  MC_OFFICIAL:
+#ifdef MC_OFFICIAL
   true,
 #else
   false,
diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
index b65a4093f2..530e4a3534 100644
--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -1023,7 +1023,7 @@ nsXULAppInfo::GetDistributionID(nsACString& aResult)
 NS_IMETHODIMP
 nsXULAppInfo::GetIsOfficial(bool* aResult)
 {
-#ifdef MOZILLA_OFFICIAL
+#ifdef MC_OFFICIAL
   *aResult = true;
 #else
   *aResult = false;
diff --git a/xpcom/system/nsIXULRuntime.idl b/xpcom/system/nsIXULRuntime.idl
index fda0e696fe..994084c0a4 100644
--- a/xpcom/system/nsIXULRuntime.idl
+++ b/xpcom/system/nsIXULRuntime.idl
@@ -164,7 +164,7 @@ interface nsIXULRuntime : nsISupports
   readonly attribute AUTF8String distributionID;
 
   /**
-   * True if this is an official build (MOZILLA_OFFICIAL).
+   * True if this is an official build (MC_OFFICIAL).
    */
   readonly attribute boolean isOfficial;