Bug 1522637 - Part 6: Enable httpResponseProcessSelection by default, r=qdot

Depends on D18606

Differential Revision: https://phabricator.services.mozilla.com/D18607

--HG--
extra : source : 41ca0b87537e8a6ca2049d6a0be20d1071aeac09

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.