diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
index 45ad9b2a0d2f..f9f991475be4 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
@@ -19,6 +19,15 @@ buildMozillaMach rec {
     sha512 = "c653824a5be5e376f53bd73589760af6bb74d7ee66f6557ec9fda4e3d795a851f49d73c063abac69aa6663f7f8b3c76b9487d0c067e33bd1c2be7733b9356325";
   };
 
+  # buildMozillaMach sets MOZ_APP_REMOTINGNAME during configuration, but
+  # unfortunately if the branding file also defines MOZ_APP_REMOTINGNAME, the
+  # branding file takes precedence. ("aurora" is the only branding to do this,
+  # so far.) We remove it so that the name set in buildMozillaMach takes
+  # effect.
+  extraPostPatch = ''
+    sed -i '/^MOZ_APP_REMOTINGNAME=/d' browser/branding/aurora/configure.sh
+  '';
+
   meta = {
     changelog = "https://www.mozilla.org/en-US/firefox/${lib.versions.majorMinor version}beta/releasenotes/";
     description = "Web browser built from Firefox Developer Edition source tree";