From 3dc12742323dada560cc2c8994f31f4fda847ed1 Mon Sep 17 00:00:00 2001
From: Gabriel Ebner <gebner@gebner.org>
Date: Sat, 9 Dec 2017 17:40:57 +0100
Subject: [PATCH] firefox: enable webrender

---
 pkgs/applications/networking/browsers/firefox/common.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index e0f2844bd532..aeae471ce5bb 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -135,6 +135,9 @@ stdenv.mkDerivation (rec {
     "--with-libclang-path=${llvmPackages.clang-unwrapped}/lib"
     "--with-clang-path=${llvmPackages.clang}/bin/clang"
   ]
+  ++ lib.optionals (stdenv.lib.versionAtLeast version "57") [
+    "--enable-webrender=build"
+  ]
 
   # TorBrowser patches these
   ++ lib.optionals (!isTorBrowserLike) [