diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index a07a61ca2257..3f09bb66e776 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -483,6 +483,9 @@ pref("browser.tabs.newanimations", false);
 pref("browser.tabs.remote.separatePrivilegedContentProcess", true);
 #endif
 
+// Turn on HTTP response process selection.
+pref("browser.tabs.remote.useHTTPResponseProcessSelection", true);
+
 pref("browser.ctrlTab.recentlyUsedOrder", true);
 
 // By default, do not export HTML at shutdown.