diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index 4fd133d8a111..a8bdcbe6c9e1 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -700,11 +700,8 @@ pref("network.http.proxy.keep-alive", true);
 // the packet is lost or delayed on the route.
 pref("network.http.keep-alive.timeout", 115);
 
-// Limit the absolute number of http connections.
-// Note: the socket transport service will clamp the number below 256 if the OS
-// cannot allocate that many FDs, and it also always tries to reserve up to 250
-// file descriptors for things other than sockets.   
-pref("network.http.max-connections", 256);
+// limit the absolute number of http connections.
+pref("network.http.max-connections", 30);
 
 // limit the absolute number of http connections that can be established per
 // host.  if a http proxy server is enabled, then the "server" is the proxy