--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -2649,21 +2649,17 @@ pref("security.signed_content.CSP.defaul
 // Mixed content blocking
 pref("security.mixed_content.block_active_content", false);
 pref("security.mixed_content.block_display_content", false);
 
 // Upgrade mixed display content before it's blocked
 pref("security.mixed_content.upgrade_display_content", false);
 
 // Block sub requests that happen within an object
-#ifdef EARLY_BETA_OR_EARLIER
-pref("security.mixed_content.block_object_subrequest", true);
-#else
 pref("security.mixed_content.block_object_subrequest", false);
-#endif
 
 // Sub-resource integrity
 pref("security.sri.enable", true);
 
 // Block scripts with wrong MIME type such as image/ or video/.
 pref("security.block_script_with_wrong_mime", true);
 
 // OCSP must-staple