--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -1882,15 +1882,13 @@ pref("dom.ipc.processHangMonitor", true)
 #ifdef DEBUG
 // Don't report hangs in DEBUG builds. They're too slow and often a
 // debugger is attached.
 pref("dom.ipc.reportProcessHangs", false);
 #else
 pref("dom.ipc.reportProcessHangs", true);
 #endif
 
-#ifndef NIGHTLY_BUILD
 // Disable reader mode by default.
 pref("reader.parse-on-load.enabled", false);
-#endif
 
 // Disable ReadingList by default.
 pref("browser.readinglist.enabled", false);