diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 1e36ae2978..8baae8ed2a 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1463,7 +1463,8 @@ pref("network.http.redirection-limit", 20);
 // Enable http compression: comment this out in case of problems with 1.1
 // NOTE: support for "compress" has been disabled per bug 196406.
 // NOTE: separate values with comma+space (", "): see bug 576033
-pref("network.http.accept-encoding", "gzip, deflate");
+// NOTE: there is currently no reason except evangelism for https to not use brotli for http
+pref("network.http.accept-encoding", "gzip, deflate, br");
 pref("network.http.accept-encoding.secure", "gzip, deflate, br");
 
 pref("network.http.pipelining"      , true);