diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 714e80acc..db8ac67a7 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1345,9 +1345,7 @@ pref("network.http.redirection-limit", 20);
 // 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");
-// pref("network.http.accept-encoding.secure", "gzip, deflate, br");
-// ESR-45 disable brotli due to library bugs fixed in 46
-pref("network.http.accept-encoding.secure", "gzip, deflate");
+pref("network.http.accept-encoding.secure", "gzip, deflate, br");
 
 pref("network.http.pipelining"      , false);
 pref("network.http.pipelining.ssl"  , false); // disable pipelining over SSL