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-rw-r--r--pkgs/applications/networking/browsers/firefox/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/networking/browsers/firefox/default.nix b/pkgs/applications/networking/browsers/firefox/default.nix
index c1458fd2fba0..e176cbdfe8a0 100644
--- a/pkgs/applications/networking/browsers/firefox/default.nix
+++ b/pkgs/applications/networking/browsers/firefox/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
     ]
     ++ (if debugBuild then [ "--enable-debug" "--enable-profiling"]
                       else [ "--disable-debug" "--enable-release"
-                             "--enable-optimize${lib.optionalString (stdenv.system == "i686-linux") "=-O3"}"
+                             "--enable-optimize${lib.optionalString (stdenv.system == "i686-linux") "=-O1"}"
                              "--enable-strip" ])
     ++ lib.optional enableOfficialBranding "--enable-official-branding";