diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index f430f9a3796..dfccff1ddee 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -67,7 +67,7 @@ pref("browser.cache.disk.capacity",         20000);
 pref("browser.cache.memory.enable",         true);
 //pref("browser.cache.memory.capacity",     -1);
 // -1 = determine dynamically, 0 = none, n = memory capacity in kilobytes
-pref("browser.cache.disk_cache_ssl",        false);
+pref("browser.cache.disk_cache_ssl",        true);
 // 0 = once-per-session, 1 = each-time, 2 = never, 3 = when-appropriate/automatically
 pref("browser.cache.check_doc_frequency",   3);