diff --git a/calendar/sunbird/app/profile/sunbird.js b/calendar/sunbird/app/profile/sunbird.js
index 42c8a37955d7..1c485be6c041 100644
--- a/calendar/sunbird/app/profile/sunbird.js
+++ b/calendar/sunbird/app/profile/sunbird.js
@@ -189,3 +189,10 @@ pref("browser.preferences.animateFadeIn", false);
 #endif
 
 pref("calendar.wcap.enabled", false);
+
+// Used by view-source
+pref("accessibility.typeaheadfind.flashBar", 1);
+pref("view_source.editor.path", "");
+pref("view_source.editor.external", false);
+pref("view_source.syntax_highlight", true);
+pref("view_source.wrap_long_lines", false);
diff --git a/configure.in b/configure.in
index 9e9951a50877..8f44532af69a 100644
--- a/configure.in
+++ b/configure.in
@@ -4339,7 +4339,7 @@ calendar)
   MOZ_CALENDAR=1
   MOZ_APP_VERSION=$SUNBIRD_VERSION
   MOZ_PLAINTEXT_EDITOR_ONLY=1
-  NECKO_PROTOCOLS_DEFAULT="about http ftp file res"
+  NECKO_PROTOCOLS_DEFAULT="about http ftp file res viewsource"
   MOZ_NO_ACTIVEX_SUPPORT=1
   MOZ_ACTIVEX_SCRIPTING_SUPPORT=
   MOZ_INSTALLER=